Add handling for account tiles for specific account type.

- List individual account instead of account type under User & account
  screen.

- Add handling to move account tiles with specific account type from
  top level account dashboard to inside the corresponding account
  preference.

- Rename settings.accounts.AccountPreference to
  settings.accounts.AccountTypePreference to make it less confused
  with settings.AccountPreference

Bug: 31801423
Test: make RunSettingsRoboTests
Change-Id: Iebe70a3c4230e8d979344f142a5c2a60945e552e

tests/robotests/src/com/android/settings/accounts/AccountSyncPreferenceControllerTest.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2016 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.accounts;
+
+import android.accounts.Account;
+import android.content.Context;
+import android.os.UserHandle;
+import android.support.v7.preference.Preference;
+
+import com.android.settings.SettingsActivity;
+import com.android.settings.SettingsRobolectricTestRunner;
+import com.android.settings.TestConfig;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.annotation.Config;
+import org.robolectric.shadows.ShadowApplication;
+
+import static org.mockito.Mockito.mock;
+import static com.google.common.truth.Truth.assertThat;
+
+@RunWith(SettingsRobolectricTestRunner.class)
+@Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
+public class AccountSyncPreferenceControllerTest {
+
+    @Test
+    public void handlePreferenceTreeClick_shouldStartFragment() {
+        final ShadowApplication application = ShadowApplication.getInstance();
+        final Context context = application.getApplicationContext();
+        final Preference preference = new Preference(context);
+        preference.setKey("account_sync");
+        AccountSyncPreferenceController controller = new AccountSyncPreferenceController(context);
+        controller.init(new Account("acct1", "type1"), mock(UserHandle.class));
+
+        controller.handlePreferenceTreeClick(preference);
+
+        assertThat(application.getNextStartedActivity().getStringExtra(
+            SettingsActivity.EXTRA_SHOW_FRAGMENT)).isEqualTo(AccountSyncSettings.class.getName());
+    }
+
+}