Volume: Confirm unsafe media volume dialog on VOL_UP.

If the confirmation dialog is showing, consider a new
VOL_UP as a confirmation.

Bug:16540877
Change-Id: Ibdaa43ea423cc3b48d234bcaaa0c542178657b6c

packages/SystemUI/src/com/android/systemui/volume/VolumePanel.java

@@ -45,6 +45,7 @@ import android.provider.Settings.Global;
 import android.util.Log;
 import android.util.SparseArray;
 import android.view.Gravity;
+import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
@@ -249,6 +250,8 @@ public class VolumePanel extends Handler {
         private final VolumePanel mVolumePanel;
         private final AudioManager mAudioManager;
 
+        private boolean mNewVolumeUp;
+
         SafetyWarning(Context context, VolumePanel volumePanel, AudioManager audioManager) {
             super(context);
             mContext = context;
@@ -266,6 +269,24 @@ public class VolumePanel extends Handler {
             context.registerReceiver(mReceiver, filter);
         }
 
+        @Override
+        public boolean onKeyDown(int keyCode, KeyEvent event) {
+            if (keyCode == KeyEvent.KEYCODE_VOLUME_UP && event.getRepeatCount() == 0) {
+                mNewVolumeUp = true;
+            }
+            return super.onKeyDown(keyCode, event);
+        }
+
+        @Override
+        public boolean onKeyUp(int keyCode, KeyEvent event) {
+            if (keyCode == KeyEvent.KEYCODE_VOLUME_UP && mNewVolumeUp) {
+                if (LOGD) Log.d(TAG, "Confirmed warning via VOLUME_UP");
+                mAudioManager.disableSafeMediaVolume();
+                dismiss();
+            }
+            return super.onKeyUp(keyCode, event);
+        }
+
         @Override
         public void onClick(DialogInterface dialog, int which) {
             mAudioManager.disableSafeMediaVolume();