Use position in window for volume touchable insets.

For a currently unknown reason (this bug began yesterday, but volume files have not changed in over a week), the touchable insets are shifted ~550px to the left, which means you can't interact with the volume panel.

Bug: 184485868
Test: manual
Change-Id: I88674a64f1f686c1f09e737bf623de7875e799c1

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

@@ -301,11 +301,13 @@ public class VolumeDialogImpl implements VolumeDialog,
         // the volume dialog container itself, so this is fine.
         for (int i = 0; i < mDialogView.getChildCount(); i++) {
             final View view = mDialogView.getChildAt(i);
+            final int[] locInWindow = new int[2];
+            view.getLocationInWindow(locInWindow);
             mTouchableRegion.op(
-                    view.getLeft(),
-                    view.getTop(),
-                    view.getRight(),
-                    view.getBottom(),
+                    locInWindow[0],
+                    locInWindow[1],
+                    locInWindow[0] + view.getWidth(),
+                    locInWindow[1] + view.getHeight(),
                     Region.Op.UNION);
         }