CMUpdater: Add Greek translation

Patchset 2: Translate forgotten strings

Patchset 3: Update translations according to some suggestions

Patchset 4: Update translations according to some suggestions

Change-Id: I174c9a410011bf97b6a4b82b8a8418d45f0b8720
Merge "CMUpdater: Add Greek translation" into jellybean
Merge remote-tracking branch 'upstream/jellybean' into jellybean