Add tablayout for work/personal profile

- Add Tablayout in ProfileSelectFragment
- Add AccountWorkProfileDashboardFragment inherited from
ProfileSelectFragment
- Add ProfileFragmentBridge to convert AccountDashboardFragment
to AccountProfileSelectFragment
- Use flag settings_work_profile to guard the new fragment

Bug: 141601408
Test: Settings->developer options->feature flags->
turn settings_work_profile on/off, then go to settings->account
to see if UI is changed.

Change-Id: Ifb32c22cdeab69c51517664081cacf4a401c46a1

src/com/android/settings/dashboard/profileselector/ProfileFragmentBridge.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2019 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.dashboard.profileselector;
+
+import android.util.ArrayMap;
+
+import com.android.settings.accounts.AccountDashboardFragment;
+import com.android.settings.accounts.AccountProfileSelectFragment;
+
+import java.util.Map;
+
+/**
+ * A registry to keep track of which page and its own profile selection page.
+ */
+public class ProfileFragmentBridge {
+
+    /**
+     * Map from parent fragment to category key. The parent fragment hosts child with
+     * category_key.
+     */
+    public static final Map<String, String> FRAGMENT_MAP;
+
+    static {
+        FRAGMENT_MAP = new ArrayMap<>();
+        FRAGMENT_MAP.put(AccountDashboardFragment.class.getName(),
+                AccountProfileSelectFragment.class.getName());
+    }
+}

src/com/android/settings/dashboard/profileselector/ProfileSelectFragment.java

@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2019 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.dashboard.profileselector;
+
+import android.annotation.IntDef;
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentStatePagerAdapter;
+import androidx.viewpager.widget.ViewPager;
+
+import com.android.settings.R;
+import com.android.settings.core.InstrumentedFragment;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Base fragment class for per profile settings.
+ */
+public abstract class ProfileSelectFragment extends InstrumentedFragment {
+
+    /**
+     * Denotes the profile type.
+     */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({PERSONAL, WORK, ALL})
+    public @interface ProfileType {
+    }
+
+    /**
+     * It is personal work profile.
+     */
+    public static final int PERSONAL = 1;
+
+    /**
+     * It is work profile
+     */
+    public static final int WORK = 1 << 1;
+
+    /**
+     * It is personal and work profile
+     */
+    public static final int ALL = PERSONAL | WORK;
+
+    private View mContentView;
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+            Bundle savedInstanceState) {
+        mContentView = inflater.inflate(R.layout.profile_select_tablayout, null /* root */);
+        final ViewPager viewPager = mContentView.findViewById(R.id.view_pager);
+        viewPager.setAdapter(new ViewPagerAdapter(this));
+        return mContentView;
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return METRICS_CATEGORY_UNKNOWN;
+    }
+
+    /**
+     * Returns an array of {@link Fragment} to display in the
+     * {@link com.google.android.material.tabs.TabLayout}
+     */
+    public abstract Fragment[] getFragments();
+
+    static class ViewPagerAdapter extends FragmentStatePagerAdapter {
+
+        private final Fragment[] mChildFragments;
+        private final Context mContext;
+
+        ViewPagerAdapter(ProfileSelectFragment fragment) {
+            super(fragment.getActivity().getSupportFragmentManager());
+            mContext = fragment.getContext();
+            mChildFragments = fragment.getFragments();
+        }
+
+        @Override
+        public Fragment getItem(int position) {
+            return mChildFragments[position];
+        }
+
+        @Override
+        public int getCount() {
+            return mChildFragments.length;
+        }
+
+        @Override
+        public CharSequence getPageTitle(int position) {
+            if (position == 0) {
+                return mContext.getString(R.string.category_personal);
+            } else {
+                return mContext.getString(R.string.category_work);
+            }
+        }
+    }
+}