temp move
Keydisabler: fix button light restore logic

Do not assign default button brightness if backup key is not found.
Instead do nothing. This will prevent brightness being reset to default
on boot when navbar is disabled.

If backup key is not found when actually toggling navbar then we've got
bigger problems.

Change-Id: I649bf1480a42f2cbe94d0a47a0c6055c934b4f56
(cherry picked from commit 7e36892a1128f9c9ec51960c9bcda91ec4e39367)
Move back
strings change
Remove CM System Update Feature

(cherry picked from commit 91fefa5c2ca581dc7115df34965b3326fb928895)