How to avoid a forced shutdown on an Android 13 device for vehicles?

I've bought a Chinese device for my car/motorcycle, which runs Android 13. I don't want to root it to keep the warranty valid, but the device is easy enough to customize: for example, I've been able to change the launcher (I'll use none of the pre-defined apps for music and navigation, and I don't have an iPhone, so the non-customizable home screen UI had no use for me). The device is meant to be "permanently installed" on the vehicle, not to be detachable: it has a power cable coming out from the back that you have to put in the vehicle and connect with screws, but it also has a USB C port. Here's the problem: it works fine when powered by the USB C port, but during the startup, a pop-up appears telling you that it will shut down in 5 seconds unless you press "Cancel" (but there are no buttons on the device apart one that only switches it off) and then it shuts down, just to boots again, and then repeat this cycle. I've been somewhat able to "bypass" that popup using a "scientific method" which is by frantically tapping everywhere on the screen until something happens (like an app starts); if it happens, then the pop-up goes and I can keep the device on as long as I want. I've not been able to find any procedure that grants me to get to this point: I just have to try and try until I succeed. I'd like better to power it using the USB port on my vehicles, so I'd need a way to know what happens at startup in order to know and disable the app (if any) that opens the pop-up; or maybe I could launch at startup some process (but very quickly) that makes it happy. I've tried the UAC program, and there's just a handful of proprietary apps in the phone (other than the launcher): they're not even hidden so I can launch them from the apps tray but they are in Chinese and apparently, they do some RAM test or ... nothing visible. - Is there a way to show on screen the processes that are running, so I can see what's alive when it wants to shut down? - Is there a way to add an app that will start at startup before anything else? - Does someone have other ideas about how to detect/block/disable the process that wants to shut down the phone if not powered by the power cable? This is the package list obtained with ADB: android android.auto_generated_rro_product__ android.auto_generated_rro_vendor__ android.ext.services android.overlay.dynamicNavBar android.overlay.navbar com.android.backupconfirm com.android.bips com.android.bluetooth com.android.bluetoothmidiservice com.android.bookmarkprovider com.android.calllogbackup com.android.captiveportallogin com.android.carrierconfig com.android.carrierdefaultapp com.android.certinstaller com.android.chrome com.android.companiondevicemanager com.android.cts.ctsshim com.android.cts.priv.ctsshim com.android.dialer com.android.documentsui com.android.dreams.basic com.android.dreams.phototable com.android.dynsystem com.android.egg com.android.emergency com.android.externalstorage com.android.gallery3d com.android.hotspot2 com.android.htmlviewer com.android.inputdevices com.android.internal.display.cutout.emulation.corner com.android.internal.display.cutout.emulation.double com.android.internal.display.cutout.emulation.tall com.android.internal.systemui.navbar.gestural com.android.internal.systemui.navbar.gestural_extra_wide_back com.android.internal.systemui.navbar.gestural_narrow_back com.android.internal.systemui.navbar.gestural_wide_back com.android.internal.systemui.navbar.threebutton com.android.internal.systemui.navbar.twobutton com.android.keychain com.android.localtransport com.android.location.fused com.android.managedprovisioning com.android.mms.service com.android.modulemetadata com.android.mtp com.android.musicfx com.android.networkstack com.android.networkstack.permissionconfig com.android.nfc com.android.ons com.android.overlay.wallpaperconfig com.android.packageinstaller com.android.pacprocessor com.android.permissioncontroller com.android.phone com.android.printspooler com.android.providers.blockednumber com.android.providers.calendar com.android.providers.contacts com.android.providers.downloads com.android.providers.downloads.ui com.android.providers.media com.android.providers.partnerbookmarks com.android.providers.settings com.android.providers.telephony com.android.providers.userdictionary com.android.provision com.android.proxyhandler com.android.se com.android.server.telecom com.android.settings com.android.settings.intelligence com.android.settings.overlay.oversea com.android.sharedstoragebackup com.android.shell com.android.simappdialog com.android.smspush com.android.sprd.telephony.server com.android.statementservice com.android.stk com.android.storagemanager com.android.systemui com.android.theme.color.black com.android.theme.color.cinnamon com.android.theme.color.green com.android.theme.color.ocean com.android.theme.color.orchid com.android.theme.color.purple com.android.theme.color.space com.android.theme.font.notoserifsource com.android.theme.icon.roundedrect com.android.theme.icon.square com.android.theme.icon.squircle com.android.theme.icon.teardrop com.android.theme.icon_pack.circular.android com.android.theme.icon_pack.circular.launcher com.android.theme.icon_pack.circular.settings com.android.theme.icon_pack.circular.systemui com.android.theme.icon_pack.circular.themepicker com.android.theme.icon_pack.filled.android com.android.theme.icon_pack.filled.launcher com.android.theme.icon_pack.filled.settings com.android.theme.icon_pack.filled.systemui com.android.theme.icon_pack.filled.themepicker com.android.theme.icon_pack.rounded.android com.android.theme.icon_pack.rounded.launcher com.android.theme.icon_pack.rounded.settings com.android.theme.icon_pack.rounded.systemui com.android.traceur com.android.vending com.android.vpndialogs com.android.wallpaper com.android.wallpaper.livepicker com.android.wallpaperbackup com.android.wallpapercropper com.asus.soundrecorder com.carletter.car com.chartcross.gpstestplus com.google.android.apps.maps com.google.android.apps.restore com.google.android.configupdater com.google.android.ext.shared com.google.android.feedback com.google.android.gms com.google.android.gms.location.history com.google.android.gmsintegration com.google.android.googlequicksearchbox com.google.android.gsf com.google.android.inputmethod.latin com.google.android.onetimeinitializer com.google.android.overlay.gmsconfig com.google.android.overlay.gmsgsaconfig com.google.android.partnersetup com.google.android.printservice.recommendation com.google.android.projection.gearhead com.google.android.syncadapters.calendar com.google.android.syncadapters.contacts com.google.android.tts com.google.android.webview com.mdc.nasoni com.microsoft.launcher com.redstone.ota.ui com.softwinner.explore com.sprd.autoslt com.sprd.cameracalibration com.sprd.cameraipcontrol com.sprd.engineermode com.sprd.logmanager com.sprd.omacp com.sprd.powersavemodelauncher com.sprd.systemupdate com.sprd.uasetting com.sprd.validationtools com.spreadtrum.proxy.nfwlocation com.spreadtrum.sgps com.spreadtrum.vce com.unisoc.aicore.uscaiengine com.unisoc.launcher.customization com.unisoc.mssv com.unisoc.storageclearmanager com.waze com.zqc.agingtesttool com.zqc.audioroute com.zqc.camera com.zqc.functioncore com.zqc.launcher com.zqc.screensaver com.zqc.usb.mediaplayer com.zxbluelet org.chromium.browser