take 2
Revert "Adjust @ppbar layout parameters so that it can receive key events when it is visible and intercept the back key to hide the @ppbar when it is pressed.  When the @ppbar is hidden the layout parameters will be restored so that it no longer receives key events."

This reverts commit 8fec82f630f1f67a72e28d8f6a85883061b149d6.

Conflicts:

	packages/SystemUI/src/com/android/systemui/statusbar/AppSidebar.java