Bump to API 34 / Android 14

[Jean-Baptiste]

https://developer.android.com/about/versions/14/features
With support to Android 14, we remove support to Android 5.0 and Android 5.1 (API 21, 22)
Tasks:

• Predictive back gestures -> need androidx.activity:activity-ktx 1.8.0
• Automatic per-app language
• Check accessibility with font scalling to 200%