Add ability to handle onActivityResult for AbstractPreferenceController in DashboardFragment

* AbstractPreferenceController now can implement OnActivityResultListener to receive callback from DashboardFragment#onActivityResult()

Bug: 270096758
Test: make RunSettingsRoboTests ROBOTEST_FILTER=com.android.settings.dashboard.DashboardFragmentTest
Change-Id: Ib734287c6fe06fcdde3b2fe6ae9f4b778020b60b

tests/robotests/src/com/android/settings/dashboard/DashboardFragmentTest.java

@@ -33,10 +33,12 @@ import static org.mockito.Mockito.when;
 import android.app.settings.SettingsEnums;
 import android.content.ContentResolver;
 import android.content.Context;
+import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ProviderInfo;
 import android.net.Uri;
 import android.os.Bundle;
+import android.preference.PreferenceManager.OnActivityResultListener;
 
 import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
@@ -356,6 +358,19 @@ public class DashboardFragmentTest {
         assertThat(pref).isInstanceOf(PrimarySwitchPreference.class);
     }
 
+    @Test
+    public void onActivityResult_test() {
+        final int requestCode = 10;
+        final int resultCode = 1;
+        final TestOnActivityResultPreferenceController activityResultPref = spy(
+                new TestOnActivityResultPreferenceController(mContext));
+        mTestFragment.addPreferenceController(activityResultPref);
+
+        mTestFragment.onActivityResult(requestCode, resultCode, null);
+
+        verify(activityResultPref).onActivityResult(requestCode, resultCode, null);
+    }
+
     public static class TestPreferenceController extends AbstractPreferenceController
             implements PreferenceControllerMixin {
 
@@ -390,6 +405,19 @@ public class DashboardFragmentTest {
         }
     }
 
+    public static class TestOnActivityResultPreferenceController extends
+            TestPreferenceController implements OnActivityResultListener {
+
+        private TestOnActivityResultPreferenceController(Context context) {
+            super(context);
+        }
+
+        @Override
+        public boolean onActivityResult(int requestCode, int resultCode, Intent data) {
+            return true;
+        }
+    }
+
     private static class TestFragment extends DashboardFragment {
 
         private final PreferenceManager mPreferenceManager;