QuietHours

Change-Id: I42fd11ce4544a7f9f1fe2b7bab2c2ee79b0cdd6b

new file:
 res/layout/preference_time_range.xml   modified:   res/values/pa_arrays.xml
 modified:   res/values/pa_strings.xml  new file:
 res/xml/quiet_hours_settings.xml       modified:   res/xml/sound_settings.xml
        modified:   src/com/android/settings/Settings.java      modified:
 src/com/android/settings/SoundSettings.java    new file:
 src/com/android/settings/cyanogenmod/QuietHours.java   new file:
 src/com/android/settings/cyanogenmod/TimeRangePreference.java