Keyguard: Fix for home wake/unlock sometimes waking and unlocking during the same keypress.

Change-Id: I72ea7611d39aac0cd03dfd5aa7036aeef7600140
SystemUI: Remove the dark pixel artifacts from the back arrow drawable

The arrow had some mostly transparent pixels that made it look
kind of like the device had defective pixels. Found by Cyril Mottier.

Change-Id: Ia78453868ebe7e3291d01c96b9beafc78ea3cdcc
Merge "Keyguard: Fix for home wake/unlock sometimes waking and unlocking during the same keypress." into cm-10.1
Merge remote branch 'cm/cm-10.1' into cm-10.1