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

src/com/android/settings/accounts/AccountSyncPreferenceController.java

@@ -0,0 +1,69 @@
+/*
+ * 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 static android.content.Intent.EXTRA_USER;
+
+import android.accounts.Account;
+import android.content.Context;
+import android.os.Bundle;
+import android.os.UserHandle;
+import android.support.v7.preference.Preference;
+
+import com.android.settings.Utils;
+import com.android.settings.core.PreferenceController;
+
+public class AccountSyncPreferenceController extends PreferenceController {
+
+    private static final String TAG = "AccountSyncController";
+    private static final String KEY_ACCOUNT_SYNC = "account_sync";
+
+    private Account mAccount;
+    private UserHandle mUserHandle;
+
+    public AccountSyncPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return true;
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (!KEY_ACCOUNT_SYNC.equals(preference.getKey())) {
+            return false;
+        }
+        final Bundle args = new Bundle();
+        args.putParcelable(AccountSyncSettings.ACCOUNT_KEY, mAccount);
+        args.putParcelable(EXTRA_USER, mUserHandle);
+        Utils.startWithFragment(mContext, AccountSyncSettings.class.getName(), args, null, 0, -1,
+            mAccount.name);
+        return true;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return KEY_ACCOUNT_SYNC;
+    }
+
+    public void init(Account account, UserHandle userHandle) {
+        mAccount = account;
+        mUserHandle = userHandle;
+    }
+}