QS: add theme switcher tile (TRDS) 2/2

this adds a theme switcher tile

normal click: turn on/off dark/light theme
longpress: switch between the auto modes (manual/light sensor/twilight)

Change-Id: I0cf66559361aad2127f7cadf6ed334656d7292b7

Conflicts:
	res/values/cr_strings.xml
	src/com/android/settings/quicksettings/QuickSettingsUtil.java