Make subsettings display edge-to-edge

Fixes: 132182711
Test: visual
Change-Id: I3b0635cba359f74d463c2360323d80c5c9533228

AndroidManifest.xml

@@ -164,7 +164,8 @@
         </receiver>
 
         <activity android:name=".SubSettings"
-                android:parentActivityName="Settings" />
+                android:parentActivityName="Settings"
+                android:theme="@style/Theme.SubSettings"/>
 
         <activity android:name=".Settings$CreateShortcutActivity"
                   android:label="@string/settings_shortcut">

res/layout/settings_base_layout.xml

@@ -19,6 +19,7 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:fitsSystemWindows="true"
     android:orientation="vertical">
     <Toolbar
         android:id="@+id/action_bar"
@@ -30,6 +31,5 @@
     <FrameLayout
         android:id="@+id/content_frame"
         android:layout_width="match_parent"
-        android:layout_height="fill_parent"
+        android:layout_height="match_parent"/>
-        android:background="?android:attr/windowBackground" />
 </LinearLayout>

res/values/themes.xml

@@ -27,8 +27,11 @@
 
     <style name="Theme.Settings" parent="Theme.SettingsBase">
         <item name="preferenceTheme">@style/PreferenceTheme</item>
+        <item name="android:clipToPadding">false</item>
+        <item name="android:clipChildren">false</item>
         <item name="android:listPreferredItemHeight">72dip</item>
         <item name="android:homeAsUpIndicator">@drawable/ic_arrow_back</item>
+        <item name="android:navigationBarColor">@android:color/transparent</item>
 
         <item name="fingerprint_layout_theme">@style/FingerprintLayoutTheme</item>
         <item name="face_layout_theme">@style/FaceLayoutTheme</item>

src/com/android/settings/SettingsActivity.java

@@ -35,7 +35,6 @@ import android.os.UserManager;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.View;
-import android.view.ViewGroup;
 import android.widget.Button;
 
 import androidx.annotation.Nullable;
@@ -51,7 +50,6 @@ import androidx.preference.PreferenceManager;
 import com.android.internal.util.ArrayUtils;
 import com.android.settings.Settings.WifiSettingsActivity;
 import com.android.settings.applications.manageapplications.ManageApplications;
-import com.android.settings.backup.BackupSettingsHelper;
 import com.android.settings.backup.UserBackupSettingsActivity;
 import com.android.settings.core.OnActivityResultListener;
 import com.android.settings.core.SettingsBaseActivity;
@@ -166,8 +164,6 @@ public class SettingsActivity extends SettingsBaseActivity
 
     private Button mNextButton;
 
-    private ViewGroup mContent;
-
     // Categories
     private ArrayList<DashboardCategory> mCategories = new ArrayList<>();
 
@@ -250,8 +246,6 @@ public class SettingsActivity extends SettingsBaseActivity
 
         setContentView(R.layout.settings_main_prefs);
 
-        mContent = findViewById(R.id.main_content);
-
         getSupportFragmentManager().addOnBackStackChangedListener(this);
 
         if (savedState != null) {

src/com/android/settings/core/SettingsBaseActivity.java

@@ -66,7 +66,12 @@ public class SettingsBaseActivity extends FragmentActivity {
             requestWindowFeature(Window.FEATURE_NO_TITLE);
         }
         super.setContentView(R.layout.settings_base_layout);
+        final View decorView = getWindow().getDecorView();
 
+        decorView.setSystemUiVisibility(
+                decorView.getSystemUiVisibility()
+                        | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+                        | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
         final Toolbar toolbar = findViewById(R.id.action_bar);
         if (theme.getBoolean(android.R.styleable.Theme_windowNoTitle, false)) {
             toolbar.setVisibility(View.GONE);

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

@@ -27,16 +27,16 @@ import android.widget.Toolbar;
 
 import androidx.annotation.VisibleForTesting;
 import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
 import androidx.fragment.app.FragmentManager;
 import androidx.fragment.app.FragmentTransaction;
 
 import com.android.settings.R;
 import com.android.settings.accounts.AvatarViewMixin;
-import com.android.settings.core.SettingsBaseActivity;
 import com.android.settings.homepage.contextualcards.ContextualCardsFragment;
 import com.android.settings.overlay.FeatureFactory;
 
-public class SettingsHomepageActivity extends SettingsBaseActivity {
+public class SettingsHomepageActivity extends FragmentActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {