Update strings.xml

adapted language file "German / Deutsch" for Version 2.x.x ALPHA | BETA | RC!
Revert "Other check for intent available"

This reverts commit d38f8140894a5b980e79f2c5056f80e0825bf858.
Merge pull request #613 from 28Black/patch-15

Update strings.xml
Merge branch 'master' of https://github.com/M66B/XPrivacy
Another try to fix detecting a file manager

Refs #327
Updated changelog
Updated changelog