SystemUI: add equalizer tile

Shows the current visualizer of current
audio output of device.

Should not show up for remote-playing device, such
as Chromecasts.

Clicking the tile opens the current EQ app.

Change-Id: Id7d073699764eacbe1d769a18c249eb80feb2a88
Signed-off-by: Roman Birg <roman@cyngn.com>

Conflicts:
	packages/SystemUI/Android.mk
	packages/SystemUI/res/layout/quick_settings_tile_equalizer.xml
	packages/SystemUI/res/values/cm_colors.xml
	packages/SystemUI/res/values/cm_strings.xml
	packages/SystemUI/src/com/android/systemui/quicksettings/EqualizerTile.java
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsController.java