Update background color for two-pane mode

Update background color for status bar and
homepage background programically.
Also, we update the backgroud color for highlight items.

Test: Rebuilt apk and see the screen.
Bug: 195293058
Change-Id: Id100f8c9c7fc02c43420afcca07a703a14ec2312

res/drawable/homepage_highlighted_item_background.xml

@@ -15,12 +15,11 @@
   limitations under the License.
   -->
 <inset xmlns:android="http://schemas.android.com/apk/res/android"
-       xmlns:androidprv="http://schemas.android.com/apk/prv/res/android"
        android:insetLeft="@dimen/homepage_menu_entry_padding_horizontal"
        android:insetRight="@dimen/homepage_menu_entry_padding_horizontal">
     <shape android:shape="rectangle">
         <solid
-            android:color="?androidprv:attr/colorAccentSecondaryVariant" />
+            android:color="?android:attr/textColorPrimary" />
         <corners
             android:radius="@dimen/homepage_menu_entry_corner_radius" />
     </shape>

res/layout/settings_homepage_container.xml

@@ -46,8 +46,7 @@
                 android:id="@+id/main_content"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:animateLayoutChanges="true"
-                android:background="?android:attr/windowBackground"/>
+                android:animateLayoutChanges="true"/>
 
         </LinearLayout>
     </androidx.core.widget.NestedScrollView>

src/com/android/settings/homepage/SettingsHomepageActivity.java

@@ -32,6 +32,8 @@ import android.util.ArraySet;
 import android.util.FeatureFlagUtils;
 import android.util.Log;
 import android.view.View;
+import android.view.Window;
+import android.view.WindowManager;
 import android.widget.FrameLayout;
 import android.widget.ImageView;
 import android.widget.Toolbar;
@@ -53,6 +55,7 @@ import com.android.settings.core.CategoryMixin;
 import com.android.settings.core.FeatureFlags;
 import com.android.settings.homepage.contextualcards.ContextualCardsFragment;
 import com.android.settings.overlay.FeatureFactory;
+import com.android.settingslib.Utils;
 import com.android.settingslib.core.lifecycle.HideNonSystemOverlayMixin;
 
 import java.net.URISyntaxException;
@@ -151,6 +154,7 @@ public class SettingsHomepageActivity extends FragmentActivity implements
         appBar.setMinimumHeight(getSearchBoxHeight());
         initHomepageContainer();
         updateHomepageAppBar();
+        updateHomepageBackground();
         mLoadedListeners = new ArraySet<>();
 
         initSearchBarView();
@@ -207,6 +211,7 @@ public class SettingsHomepageActivity extends FragmentActivity implements
         if (mIsTwoPaneLastTime != isTwoPane) {
             mIsTwoPaneLastTime = isTwoPane;
             updateHomepageAppBar();
+            updateHomepageBackground();
         }
     }
 
@@ -237,6 +242,23 @@ public class SettingsHomepageActivity extends FragmentActivity implements
         }
     }
 
+    private void updateHomepageBackground() {
+        if (!mIsEmbeddingActivityEnabled) {
+            return;
+        }
+
+        final Window window = getWindow();
+        final int color = ActivityEmbeddingUtils.isTwoPaneResolution(this)
+                ? Utils.getColorAttrDefaultColor(this, com.android.internal.R.attr.colorSurface)
+                : Utils.getColorAttrDefaultColor(this, android.R.attr.colorBackground);
+
+        window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
+        // Update status bar color
+        window.setStatusBarColor(color);
+        // Update content background.
+        findViewById(R.id.settings_homepage_container).setBackgroundColor(color);
+    }
+
     private void showSuggestionFragment() {
         final Class<? extends Fragment> fragment = FeatureFactory.getFactory(this)
                 .getSuggestionFeatureProvider(this).getContextualSuggestionFragment();