Camera: Update German translation

Patch Set 1:   * add missing strings
               * some cleanup

Change-Id: I07b0f8ae4deb3b67258595d5046c22933738e657
camera: Add 2.4MP, 6MP, 7MP resolution strings

Change-Id: Ic2e4d4ef1345743150d5be1fb9a0f17c909a2ff8
Camera: Update German translation

Change-Id: If9ea824ee8403196be0c8a29f09720f02e6a5a5c