Add “hasFragileUserData” + Update target sdk 29

[dmpr0]

Since Android 10, apps can add a flag that allows system to ask the user about app data while deleting or reinstalling the app.

If true the user is prompted to keep the app's data on uninstall
https://developer.android.com/reference/android/R.attr#hasFragileUserData

[vshcherb]

Upgarde targetSdkVersion 28 -> 29
https://developer.android.com/about/versions/10/behavior-changes-all

[Chumva]

This should be added here #10022. But it needs testing because I wasn`t able to check hasFragileUserData.