Add SCENE_MODE_OFF support for Camera framework

Some cameras such as on C800 (LG) need SCENE_MODE_OFF instead
of SCENE_MODE_AUTO. Otherwise Camera HAL thinks there is an
active scene mode and disables certain features. Changes in
both Framework and Camera App necessary.

Change-Id: Ieb510d2070853463be295497f945f930de220ba4

core/java/android/hardware/Camera.java

@@ -1849,6 +1849,12 @@ public class Parameters {
          */
         public static final String FLASH_MODE_TORCH = "torch";
 
+        /**
+         * Scene mode is off. (for some QCom)
+         * @hide
+         */
+        public static final String SCENE_MODE_OFF = "off";
+
         /**
          * Scene mode is off.
          * @hide