Keyguard Acceleration

Change-Id: Ia3621e8ce97b6b6a41e4e79f88872b9c5888e7b3
Lockscreen Targets: Icon Revamp

Adjust the size of custom app icons and resize and round the corners
of gallery icons for a more uniform look.

Before http://imgur.com/cTOqdwX

After http://imgur.com/EKAeFiw

Change-Id: Ibcca275eb0ae946775773a8c8217b6508da10e5b
Make system layout fill the window properly on expanded desktop mode

This commit fixes e.g. the gap on the bottom of the lock screen
or the gap on the right side of status bar on landscape mode.

Change-Id: Ifedfd532c6eb26cffcb1e3cc2773aa67c9b1fa70