Fix navbar editor for RTL layouts.

Remove navigation bar layout XML override which wasn't needed anyway, as
the views in mid_navigation_bar are already reordered based on the
layout direction anyway.

Change-Id: Id57c781d9580fa0cb2eab3bb332daf4136bec321
JIRA:CYAN-2557
Fix a bootloop problem when /data/system/usagestats/usage-history.xml is empty.
This often occurs after an incomplete reboot/shutdown or battery pull.

Change-Id: I4f01151f4051df4ae1b85fa460ec7a9e70122878
Merge "Fix navbar editor for RTL layouts." into cm-10.2
Merge "Fix a bootloop problem when /data/system/usagestats/usage-history.xml is empty. This often occurs after an incomplete reboot/shutdown or battery pull." into cm-10.2
Merge branch 'cm-10.2' into martincz