Android 12 features first phase

Let's add support for the following Android features introduced in Android 12:

1. Rich content insertion
   Android 12 introduces a unified API for inserting content from any source: clipboard, keyboard, or drag-and-drop. Research and implement. QTBUG-99595
2. App splash screens API
   Android 12 introduces a new splash screen API that enables a customizable app launch animation for all apps.Research usefulness.QTBUG-99596
3. Bluetooth permissions
   Android 12 introduces new permissions that let apps scan for nearby Bluetooth devices without requesting location permissions. Interesting for QtBluetooth.QTBUG-99590