Left handed mode: Disable on tablets

No need to have this option because tablets have nav bar on the bottom.

PS5: Use the correct PreferenceCategory
PS6: Update to refect new location of setting

Change-Id: I622918931649f6190e17eef47e7af68364b6e76e
Signed-off-by: Tianrui Guo <tianrui@pac-rom.com>
Merge "Left handed mode: Disable on tablets" into pac-4.4