LockscreenTargets : Dismiss on target select

Only dismiss prior to activity launch for lockscreen shortcuts,
camera and appwidget picker remain untouched.

Change-Id: I2770c628ce0708570aa6ea0eac9e3cd1d82287fb
Revert "am: Allow more hidden apps on devices with lots of RAM"

 * This isn't actually needed on 4.2+

This reverts commit 03a420191d8063a8def901b1955b7c477185d62d.

Change-Id: I1c4ef3c9c00882bf2c36ad042c368bacc0f9220f
Fix pie controls being disabled by launcher gestures.

Some launchers have gestures for expanding/collapsing the status bar
from swipe gestures which call the respective StatusBarService methods
even if the status bar isn't visible due to expanded desktop. Because of
that, the status bar code internally thinks the expansion is carried out
(even if invisible), thus disabling the bottom pie controls in the
process.
Fix that by making PhoneStatusBar aware of it being hidden by expanded
desktop and ignoring the expand call in that case.

Change-Id: If386ca953517d9b5efcb6cb9054f5c5e6a9e0bc4