QuietHours

Change-Id: I96d937e2b418b8b79178c98325fe7c6837543269

modified:
 core/java/android/provider/Settings.java       modified:
 core/java/android/view/VolumePanel.java        new file:
 core/java/com/android/internal/util/cm/QuietHoursUtils.java    modified:
 media/java/android/media/AudioManager.java     modified:
 packages/Keyguard/src/com/android/keyguard/KeyguardViewMediator.java
 modified:   services/java/com/android/server/BatteryService.java
 modified:   services/java/com/android/server/NotificationManagerService.java
 modified:   services/java/com/android/server/VibratorService.java