try to fix f-droid

build.gradle

@@ -2,8 +2,8 @@
 
 buildscript {
     repositories {
-        jcenter()
         google()
+        jcenter()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.1.4'
@@ -12,11 +12,11 @@ buildscript {
 
 allprojects {
     repositories {
-        jcenter()
         maven {
             url "https://maven.google.com"
         }
         google()
+        jcenter()
     }
 }