Change density on the fly: Update to PS31

Change-Id: Ifd036c75f0423c334f8e25aaf6b3229833e779d7
Lockscreen: Notifications: Fix for devices without proximity sensor

Change-Id: I6b587fb7516c1aac89cc3245793731f8fca6bece
HOVER [2/2]

Change-Id: I36eab90e6c06b31c053293a35034d8f5b99fbf03