Remove LocalePickerWithRegion class in Settings.

This class is too complex, we can't afford maintaining this long term.
We need a new Activity that wraps the framework version of LocalePickerWithRegion.

Bug: 111373939
Test: manual test & make RunSettingsRoboTests -j56

Change-Id: I93c719246b84350d2eee4e8ce1ffd97cd168925b

tests/robotests/src/com/android/settings/localepicker/LocalePickerWithRegionActivityTest.java

@@ -0,0 +1,51 @@
+package com.android.settings.localepicker;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+
+import android.app.Activity;
+
+import com.android.internal.app.LocaleStore;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.Robolectric;
+import org.robolectric.Shadows;
+import org.robolectric.android.controller.ActivityController;
+import org.robolectric.shadows.ShadowActivity;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+public class LocalePickerWithRegionActivityTest {
+
+    private LocalePickerWithRegionActivity mActivity;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        final ActivityController<LocalePickerWithRegionActivity> mActivityController =
+                Robolectric.buildActivity(LocalePickerWithRegionActivity.class);
+        mActivity = spy(mActivityController.get());
+    }
+
+    @Test
+    public void onLocaleSelected_resultShouldBeOK() {
+        final ShadowActivity shadowActivity = Shadows.shadowOf(mActivity);
+        mActivity.onLocaleSelected(mock(LocaleStore.LocaleInfo.class));
+
+        assertEquals(Activity.RESULT_OK, shadowActivity.getResultCode());
+    }
+
+    @Test
+    public void onLocaleSelected_localeInfoShouldBeSentBack() {
+        final ShadowActivity shadowActivity = Shadows.shadowOf(mActivity);
+        mActivity.onLocaleSelected(mock(LocaleStore.LocaleInfo.class));
+
+        assertNotNull(shadowActivity.getResultIntent().getSerializableExtra(
+                LocaleListEditor.INTENT_LOCALE_KEY));
+    }
+}