Consistently use start/end instead of left/right layout properties.

Fixes various RTL language bugs.

Change-Id: I3be9c9c54e4fd14a561f6b38ce1601bc66c8351b
Merge "Consistently use start/end instead of left/right layout properties." into cm-11.0
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0-sgt7