Do less work on configuration change.

am: 494f0dedb2

Change-Id: I6e23ab27d42c7b2dd67f5570e67656b147b3ed71

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

@@ -973,6 +973,7 @@ public class VolumeDialog implements TunerService.Tunable {
                 mDialog.dismiss();
                 mZenFooter.cleanup();
                 initDialog();
+                mDensity = density;
             }
             updateWindowWidthH();
             mSpTexts.update();