Migrate all AlertDialogs to AndroidX version

- Let test cases can be compatible with AndroidX AlertDialog.
- Theme of Transparent needs to support AndroidX AlertDialog.

Change-Id: I0789b66f52feef30ebab7fb824d0e39d5ae9cc96
Fixes: 111413092
Test: make RunSettingsRoboTests -j56

tests/robotests/src/com/android/settings/bluetooth/RemoteDeviceNameDialogFragmentTest.java

@@ -25,7 +25,6 @@ import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
-import android.app.AlertDialog;
 import android.content.DialogInterface;
 import android.widget.Button;
 import android.widget.EditText;
@@ -33,6 +32,7 @@ import android.widget.EditText;
 import com.android.settings.R;
 import com.android.settings.testutils.FakeFeatureFactory;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
+import com.android.settings.testutils.shadow.SettingsShadowResourcesImpl;
 import com.android.settingslib.bluetooth.CachedBluetoothDevice;
 import com.android.settingslib.testutils.FragmentTestUtils;
 
@@ -42,9 +42,13 @@ import org.junit.runner.RunWith;
 import org.mockito.Answers;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
+import org.robolectric.annotation.Config;
 import org.robolectric.shadows.ShadowDialog;
 
+import androidx.appcompat.app.AlertDialog;
+
 @RunWith(SettingsRobolectricTestRunner.class)
+@Config(shadows = SettingsShadowResourcesImpl.class)
 public class RemoteDeviceNameDialogFragmentTest {
 
     @Mock(answer = Answers.RETURNS_DEEP_STUBS)