Revert "core: fix volume panel more button transparency"

This reverts commit 9eeca7dd10e7f6bd48abcb127934a06aab4b0a08.
Revert "core: add support for translucent volume panel"

This reverts commit d7706b7bb8cc3521cbba17c7460d9fc43633d680.
VolumePanel: Rework design on top of Hover

Signed-off-by: David L.-W. <xD_e-mail@gmx.de>

Conflicts:
	core/java/android/view/VolumePanel.java
	packages/SystemUI/src/com/android/systemui/statusbar/notification/Hover.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

Change-Id: Id6009d06644738d640bea568f0ca5470ecd735a6