framework: Update German translation

Before: http://goo.gl/1qlze
After:  http://goo.gl/oElpC

Patch Set 1:    * add missing quick setting translations
                  http://review.cyanogenmod.org/#/c/30327/

Patch Set 2:    * rename some strings

Patch Set 3:	* some cleanup

Patch Set 4:    * add missing quick setting translations
                  http://review.cyanogenmod.org/#/c/31184/

Patch Set 5:    * rebased

Change-Id: I3d45b431a0f8afbd802a26cf87e83a6dd0a0f081