Fix some gradle warnings

app/build.gradle

@@ -93,7 +93,7 @@ task checkstyle(type: Checkstyle) {
     reports {
         xml.enabled = true
         html.enabled = true
-        html.destination = "$project.buildDir/reports/checkstyle/checkstyle.html"
+        html.destination = project.file("$buildDir/reports/checkstyle/checkstyle.html")
     }
 }
 

app/src/release/google-services.json

@@ -0,0 +1,42 @@
+{
+  "project_info": {
+    "project_number": "363426363175",
+    "firebase_url": "https://tasks-98543.firebaseio.com",
+    "project_id": "tasks-98543",
+    "storage_bucket": "tasks-98543.appspot.com"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:363426363175:android:9bc4739db40ecb39",
+        "android_client_info": {
+          "package_name": "org.tasks"
+        }
+      },
+      "oauth_client": [
+        {
+          "client_id": "363426363175-n0862rti6ect01fr3t4m229hqvvu1s8a.apps.googleusercontent.com",
+          "client_type": 3
+        }
+      ],
+      "api_key": [
+        {
+          "current_key": "AIzaSyACOYpQZEIkpF2EykbufMOZXn9QVrP_5lI"
+        }
+      ],
+      "services": {
+        "analytics_service": {
+          "status": 1
+        },
+        "appinvite_service": {
+          "status": 1,
+          "other_platform_oauth_client": []
+        },
+        "ads_service": {
+          "status": 2
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}

build.gradle

@@ -14,7 +14,7 @@ buildscript {
 
     dependencies {
         classpath 'com.android.tools.build:gradle:3.2.0-beta01'
-        classpath 'com.google.gms:google-services:3.2.0'
-        classpath 'io.fabric.tools:gradle:1.25.1'
+        classpath 'com.google.gms:google-services:4.0.1'
+        classpath 'io.fabric.tools:gradle:1.25.4'
     }
 }