Fix divisions by zero on boot.

Change I976ffae3a56d411b00026f86b16efa9743a23293 introduced a problem
where depending on the rotation settings the WM override display
configuration would be filled with invalid values.
Fix that by correctly checking that the display is ready prior to
setting the override configuration.

Change-Id: Ia3fd7603d9c1212cd32536803b4c12390a798606
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 reverts commit 3c3d7447c8bc749d5723bf01edfdbfcd2f954e64.
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