termux-boot is not working on Xiaomi Redmi 7A on Android 10

[AntonSamokat]

This pull request is a fix for boot_completed is not working on Android 10

For details see:
https://stackoverflow.com/a/63250729/
https://www.reddit.com/r/tasker/comments/d7whyj/android_10_and_auto_starting_apps/
https://stackoverflow.com/q/64642362/
https://stackoverflow.com/a/19856267/

Related pull request for termux-app:
termux-app is not booted and not properly working in background on Android 10 (on Xiaomi Redmi 7A)
termux/termux-app#3870

[agnostic-apollo]

SYSTEM_ALERT_WINDOW would be needed if a window needs to be brought up to foreground by an app in background. That is not needed by termux-boot at it does not do that and moreover only sends intent commands to termux-app for it to run shell commands.

FOREGROUND_SERVICE is not needed either because termux-boot does not have a foreground service.