Add option to reset all runtime permissions on Android

[timrid]

This PR adds the option --reset-permissions to reset all runtime permissions of an app on Android before it is launched.

I am currently working on porting the BLE library bleak for Android with briefcase and am also creating integration tests for this. In the integration tests, I create a virtual Bluetooth peripheral using bumble and connect it to the Android emulator (netsim, to be precise) to test the reading/writing of characteristics, etc. However, I also test the Bluetooth permissions by confirming the Bluetooth Permission dialog via uiautomator2.

However, when I test this locally and confirm the dialog once, it remains permanently stored in the emulator. The tests run because the permissions have already been granted, but the code coverage is worse. Therefore, I need the option --reset-permissions to have a reproducible starting point for the app.

PR Checklist:

• All new features have been tested
• All new features have been documented
• I have read the CONTRIBUTING.md file
• I will abide by the code of conduct