Allow creating custom dialogs in DialogPreference.

This allows creating non-AlertDialogs while still using the click and
state handling of DialogPreference.

Change-Id: I54fd7d6d6b9f6a49fef1ae95e0178838b3edfa56
SystemUI: Tiny expanding improvement

Signed-off-by: BigBrother1984 <carlosavignano@aospa.co>
SystemUI: Make volume panel in/out animation slicker

Signed-off-by: BigBrother1984 <carlosavignano@aospa.co>
Change-Id: Ic79d404c4a0d5bc0a83d20cd4e0d7d5ad7b7c90f