SystemUI: Remove nav bar background in QS customizer

This looks outdated, since most apps are edge-to-edge nowadays.

Change-Id: I8c54e61e618a9b5bed1a59753ce76e8fbd69fae2
Signed-off-by: Dmitrii <bankersenator@gmail.com>

Author: kdrag0n

packages/SystemUI/res/layout/qs_customize_panel_content.xml

@@ -56,10 +56,4 @@
             android:importantForAccessibility="auto" />
     </com.android.keyguard.AlphaOptimizedLinearLayout>
 
-    <View
-        android:id="@+id/nav_bar_background"
-        android:layout_width="match_parent"
-        android:layout_height="@dimen/navigation_bar_size"
-        android:layout_gravity="bottom"
-        android:background="#ff000000" />
 </merge>

packages/SystemUI/src/com/android/systemui/qs/customize/QSCustomizer.java

@@ -93,12 +93,8 @@ void updateResources() {
     }
 
     void updateNavBackDrop(Configuration newConfig, LightBarController lightBarController) {
-        View navBackdrop = findViewById(R.id.nav_bar_background);
         mIsShowingNavBackdrop = newConfig.smallestScreenWidthDp >= 600
                 || newConfig.orientation != Configuration.ORIENTATION_LANDSCAPE;
-        if (navBackdrop != null) {
-            navBackdrop.setVisibility(mIsShowingNavBackdrop ? View.VISIBLE : View.GONE);
-        }
         updateNavColors(lightBarController);
     }