DeskClock: Update German translation

Patch Set 1:    * add translations for increasing volume
                  http://review.cyanogenmod.org/#/c/31623/
                * improve code formatting

Patch Set 2:    * revert code formatting cahnges

Patch Set 3:    * trigger CID

Patch Set 4:    * change wording

SCREENSHOT: http://goo.gl/8hvNV

Change-Id: I4ff58a14ccbd9e18459384cdc3f114abc613c75c