[Theater Mode] framework implementation through global setting

Bug: 17684570
Change-Id: I64a9c9c0620049cdfcca0150648fa201281f7178
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 79e84d9..b1c338e 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -5086,6 +5086,12 @@
         public static final String AIRPLANE_MODE_ON = "airplane_mode_on";
 
         /**
+         * Whether Theater Mode is on.
+         * {@hide}
+         */
+        public static final String THEATER_MODE_ON = "theater_mode_on";
+
+        /**
          * Constant for use in AIRPLANE_MODE_RADIOS to specify Bluetooth radio.
          */
         public static final String RADIO_BLUETOOTH = "bluetooth";