Make android.settings.SETTINGS intent go into homepage.

Change-Id: Ib7453a79a473410c44bdcf06019446cedd34f837
Fixes: 117281845
Test: robotests

tests/robotests/src/com/android/settings/homepage/SettingsHomepageActivityTest.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.homepage;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.util.FeatureFlagUtils;
+
+import com.android.settings.SettingsActivity;
+import com.android.settings.core.FeatureFlags;
+import com.android.settings.testutils.SettingsRobolectricTestRunner;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.Robolectric;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.Shadows;
+import org.robolectric.shadows.ShadowActivity;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+public class SettingsHomepageActivityTest {
+
+    @Test
+    public void launch_featureFlagOff_shouldRedirectToSettingsActivity() {
+        FeatureFlagUtils.setEnabled(RuntimeEnvironment.application, FeatureFlags.DYNAMIC_HOMEPAGE,
+                false);
+
+        final ShadowActivity shadowActivity = Shadows.shadowOf(
+                Robolectric.setupActivity(SettingsHomepageActivity.class));
+        assertThat(shadowActivity.getNextStartedActivity().getComponent().getClassName())
+                .isEqualTo(SettingsActivity.class.getName());
+    }
+}