Support category changed mechanism in homepage

- Homepage cannot referesh UI whenever an injected component is changed
- Extract categories related codes to a mixin

Test: manual, robotest
Fixes: 179792445
Change-Id: I1c13c541ce07b9c36fe984a035623985b5603560

src/com/android/settings/SettingsActivity.java

@@ -36,10 +36,8 @@ import android.os.Bundle;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.text.TextUtils;
-import android.util.FeatureFlagUtils;
 import android.util.Log;
 import android.view.View;
-import android.view.Window;
 import android.widget.Button;
 
 import androidx.annotation.Nullable;
@@ -55,7 +53,6 @@ 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.core.FeatureFlags;
 import com.android.settings.core.OnActivityResultListener;
 import com.android.settings.core.SettingsBaseActivity;
 import com.android.settings.core.SubSettingLauncher;
@@ -70,7 +67,6 @@ import com.android.settingslib.core.instrumentation.SharedPreferencesLogger;
 import com.android.settingslib.development.DevelopmentSettingsEnabler;
 import com.android.settingslib.drawer.DashboardCategory;
 
-import com.google.android.material.transition.platform.MaterialSharedAxis;
 import com.google.android.setupcompat.util.WizardManagerHelper;
 
 import java.util.ArrayList;
@@ -689,7 +685,7 @@ public class SettingsActivity extends SettingsBaseActivity
         if (somethingChanged) {
             Log.d(LOG_TAG, "Enabled state changed for some tiles, reloading all categories "
                     + changedList.toString());
-            updateCategories();
+            mCategoryMixin.updateCategories();
         } else {
             Log.d(LOG_TAG, "No enabled state changed, skipping updateCategory call");
         }