[1/2] Base: On-The-Go: Add quicktile

Also thanks to @Alex-Cruz for all these nice talks, which improved the
quality of the On-The-Go mode :)

PS 2:
On-The-Go drawables, made by Alex-Cruz, thanks!

Change-Id: I9413d4726428240aefd76ab06532b34dbfb04a2f

Conflicts:

	core/java/com/android/internal/util/mahdi/QSConstants.java
	packages/SystemUI/res/values/custom_strings.xml
	packages/SystemUI/src/com/android/systemui/statusbar/phone/QuickSettingsController.java