Better expose 'QS Tiles and layout' function

Settings side changes for http://review.cyanogenmod.org/#/c/56619/

PS2: Unhide draft
PS3: Make it actually work
PS4: Change title on fragment & fix available tiles
PS5: Actually fix removing unsupported tiles (tested on maguro)

Change-Id: I331ffdd17574d32d40d423a6d37240361288bce4
(cherry picked from commit f725b75fcf0ae90d84019f4452397fb311937cd0)

Conflicts:
	src/com/android/settings/Settings.java
	src/com/android/settings/quicksettings/QuickSettingsTiles.java
	src/com/android/settings/quicksettings/QuickSettingsUtil.java