Auto whitelist an apps sdcard directory

[jpeg729]

Directories like the following should probably be whitelisted automatically.
/storage/sdcard0/Android/data/com.quoord.tapatalkpro.activity/

[M66B]

This can only be done from the UI.
Low level application information isn't available.
I had to search for a way to find the external storage location while implementing this feature.
An additional problem is that getExternalStorageDirectory requires a user context in newer Android versions.

[jpeg729]

Does open require one too?
If so, the hook could check.

[M66B]

I am merging this into #1375
My proposal is to make it possible to white list folder, solving this issue and adding more flexibility.