No back icon in action bar of APN Settings

When entering the APN menu, the actionbar is missing a back
icon allowing the user to go back to the previous pane.

Added parentActivityName in ApnSettings, to enable action
bar back icon.

Change-Id: Iee8bb420f47c0e2c0d9a43739f534466abba30db
Merge "No back icon in action bar of APN Settings" into cm-10.1
Settings: Update translations

Patch Set 1:    * add missing strings
                * we are in 2013

Patch Set 2:    * rename strings after comments

Patch Set 3:    * rebase


Change-Id: Id3f9b3361f4de1e1ad3f10507322d7df2804fdff
Merge "Settings: Update translations" into cm-10.1
Merge remote-tracking branch 'upstream/cm-10.1' into cm-10.1