PIE: fix stuck pixel on screen redraw - PA

Uses a dummmy view to force the screen to be redrawn on screen update

Change-Id: Ia12e596f81583a3b6be1bef64ae9d46b32d410d2

Conflicts:
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
added volume adjustment also for BT voice audio (see credit below)

Credit and Thanks to maxwen
Fix crash on KeyguardViewManager when lockscreen hasn't been shown

If lockscreen has never appeared (first rom boot), and you enable see
through, you will end up crashing system_server. This fixes it

Patchset 2: fix comment typo
statusbar freeze fix (hopefully)

Change-Id: Ida304fc281d9fb44f6c69a2c5da29a28c0e56f66
statusbar freeze fix (hopefully)

Change-Id: Ida304fc281d9fb44f6c69a2c5da29a28c0e56f66