Update the color of the bubble expanded view pointer arrow to match the background color of the overflow expanded view.

Fixes: 280868378
Test: Tested on a physical device
Change-Id: Iafbe48ffbd9c6ddbeaa0a27bac0f01f7d289464b

libs/WindowManager/Shell/src/com/android/wm/shell/bubbles/BubbleExpandedView.java

@@ -478,7 +478,7 @@ public class BubbleExpandedView extends LinearLayout {
     void applyThemeAttrs() {
         final TypedArray ta = mContext.obtainStyledAttributes(new int[]{
                 android.R.attr.dialogCornerRadius,
-                android.R.attr.colorBackgroundFloating});
+                com.android.internal.R.attr.materialColorSurfaceBright});
         boolean supportsRoundedCorners = ScreenDecorationsUtils.supportsRoundedCornersOnWindows(
                 mContext.getResources());
         mCornerRadius = supportsRoundedCorners ? ta.getDimensionPixelSize(0, 0) : 0;