[WIP] SlimPIE (2/2)

Ported from CM sources by @cristianomatos

Change-Id: I32c79ff3400e2878dc9e9144779c6f7dee09cba1
Settings: SlimPie give user ability to reduce trigger heights if IME keyboard shows (2/2)

Add a user option to reduce left and right trigger of SlimPie if keyboard shows up
(especially usefull for swipe keyboard which most keyboards are nowadays). Enabled
by default user can disable it in settings

Change-Id: Ia87a8f46e6909bd42ad4fbcde01be03b2792d869