LatinIME: Bring back ALL the keys for QWERTZ

* QWERTZ keyboards were using rowkeys_qwerty2.xml as 2nd row.
  Add rowkeys_qwertz2.xml and enable AdditionalMoreKeys

Change-Id: Ibd4a578a2cd89e834cbf8cd7fb677c0dcba55547
Merge remote-tracking branch 'cm/cm-11.0' into HEAD