frameworks: base: systemui: modify hdpi & xhdpi drawables for battery_min

* These drawables are to large for the new phablet ui. See screenshot:
  http://i.imgur.com/AR8BUH8.png This change modifies the hdpi and xhdpi
  drawables to the sw720p-mdpi drawables, which look correct in the status
  bar.

Patch Set 4: modify commit message to reflect the change

Change-Id: I4f94dbdd37d0b8d9a7efbe9a78c3816eaa33b173
Framework: Enable multi-user support for Quiet Hours

Change-Id: Ica967ff6bf5842a08421583449876ba73de13d51
Framework: Enable multi-user support for Notification light

Change-Id: I4fb84fdb0c9e1592c2a421011c303a789cde8c8c
Framework: Fix multi-user support in AudioService

Change-Id: Iddeeeac0734a237103e238bcdaa1e85806a64e4f
Framework:  Fix security exception

Change-Id: I4fa1f55c8209e6890b6cea13b0ed4d781f9f615d