Bug 1197147 - Gradle build: Use version 8.1 of Google Play Services. r=nalexander

--HG--
extra : commitid : Cugw33Fj8QG
extra : rebase_source : 404811c62a45b089095af8e4b4e952fdb183bb78

mobile/android/gradle/base/build.gradle

@@ -76,8 +76,9 @@ dependencies {
 
     if (mozconfig.substs.MOZ_NATIVE_DEVICES) {
         compile 'com.android.support:mediarouter-v7:22.2.1'
-        compile 'com.google.android.gms:play-services-base:7.8.0'
-        compile 'com.google.android.gms:play-services-cast:7.8.0'
+        compile 'com.google.android.gms:play-services-basement:8.1.0'
+        compile 'com.google.android.gms:play-services-base:8.1.0'
+        compile 'com.google.android.gms:play-services-cast:8.1.0'
     }
 
     compile project(':branding')