Phone: Update German translation

Patch Set 1:    * add missing translation for flip action
                * some layout cleanup
                * update copyright

Patch Set 2:    * fix typo
                * change wording

Patch Set 3:    * change wording again

Patch Set 4:    * rebased

Change-Id: I34099afe6746b3fbb5734b77351ec046afc9a059