Add toggle for screenshot shutter sound [1/2]

Signed-off-by: Alex Naidis <alex.naidis@linux.com>

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/screenshot/GlobalScreenshot.java

Change-Id: Ibe912727805a0c6d6c96ba874454b6f7de81e897
2 files changed