Theme special volumeup+down volume panel

When you press vol up + vol down button it brings up a
different volume panel which was not getting themed because
it lacked the ui context.

Change-Id: I416b8920160c0ab263fd426a6e6491d1f877a905
GEL Integration (1/3)

Changed INJECT_EVENTS permission from signature to signatureOrSystem.

Change-Id: Ie3633aa2ee7a2f22b7f32232ce4d3d98f33fd39d