Settings: Allow access for external apps to launch ThemeSettings Fragment directly

Change-Id: I93b676d3eb570c7064eeb4217c8e420a186c8e32
Merge "Settings: Allow access for external apps to launch ThemeSettings Fragment directly" into cm-11.0
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_Settings into android-4.4

Conflicts:
	src/com/android/settings/Settings.java