acardemulator: explicitly link to google maven

ACardEmulator/build.gradle

@@ -2,6 +2,9 @@
 
 buildscript {
     repositories {
+        maven {
+            url 'https://maven.google.com'
+        }
         jcenter()
     }
     dependencies {
@@ -15,6 +18,9 @@ buildscript {
 
 allprojects {
     repositories {
+        maven {
+            url 'https://maven.google.com'
+        }
         jcenter()
     }
 }