T4T migration to Jetpack Compose

- migrate activities
- x AboutActivity
  - removed
- x HelpActivity
  - removed
- x MainMenuActivity
  - removed
- - OBDActivity
- - PrivacyPolicyActivity
- x SplashActivity
  - removed
- - TrackingActivity
- x TrackingActivityOld
  - removed
+ target API 33/34
- upgrade AdSense Libs
- upgrade billing libs
- test
- - all activities
- - tracking
- - OBD
  - e.g. using OBDSim
- - ads
- - billing