Framework: Quiet Hours System Sounds (1/2)

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

	modified:   core/java/android/provider/Settings.java
	modified:   core/java/android/view/VolumePanel.java
	modified:   media/java/android/media/AudioManager.java
	modified:   packages/Keyguard/src/com/android/keyguard/KeyguardViewMediator.java
	modified:   packages/SystemUI/src/com/android/systemui/screenshot/GlobalScreenshot.java
Change-Id: I12756da4904784d240f6f2980dc05ddf339e2c5f
	modified:   core/java/android/provider/Settings.java
	modified:   core/java/android/view/VolumePanel.java
	modified:   media/java/android/media/AudioManager.java
	modified:   packages/Keyguard/src/com/android/keyguard/KeyguardViewMediator.java
	modified:   packages/SystemUI/src/com/android/systemui/screenshot/GlobalScreenshot.java