Add fake contact sync to fix AOSP contact app

play-services-core/src/main/AndroidManifest.xml

@@ -289,6 +289,17 @@
             </intent-filter>
         </service>
 
+        <service
+            android:name="org.microg.gms.people.ContactSyncService"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="android.content.SyncAdapter"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.content.SyncAdapter"
+                android:resource="@xml/contact_syncadapter"/>
+        </service>
+
         <!-- Wearable -->
 
         <service android:name="org.microg.gms.wearable.WearableService">

play-services-core/src/main/java/org/microg/gms/people/ContactSyncService.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2017 microG Project Team
+ *
+ * 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 org.microg.gms.people;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.IBinder;
+import android.support.annotation.Nullable;
+
+public class ContactSyncService extends Service {
+    @Nullable
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+}

play-services-core/src/main/res/xml/contact_syncadapter.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2017 microG Project Team
+  ~
+  ~ 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.
+  -->
+
+<sync-adapter xmlns:android="http://schemas.android.com/apk/res/android"
+              android:accountType="com.google"
+              android:contentAuthority="com.android.contacts"
+              android:userVisible="false"/>