Update gma to use mavenCentral (#1132)

Author: a-maurice

gma/build.gradle

@@ -15,7 +15,7 @@
 buildscript {
   repositories {
     google()
-    jcenter()
+    mavenCentral()
   }
   dependencies {
     classpath 'com.android.tools.build:gradle:3.3.3'
@@ -24,17 +24,12 @@ buildscript {
 allprojects {
   repositories {
     google()
-    jcenter()
+    mavenCentral()
   }
 }
 
 apply plugin: 'com.android.library'
 
-ext {
-  firebaseAndroidStl = System.getenv('FIREBASE_ANDROID_STL')
-  firebaseAndroidStl = firebaseAndroidStl != null ? firebaseAndroidStl : ''
-}
-
 android {
   compileSdkVersion 28
   buildToolsVersion '28.0.3'
@@ -71,8 +66,7 @@ android {
         //           Only include needed project.
         arguments '-DFIREBASE_CPP_USE_PRIOR_GRADLE_BUILD=ON',
                 '-DFIREBASE_INCLUDE_LIBRARY_DEFAULT=OFF',
-                '-DFIREBASE_INCLUDE_GMA=ON',
-		            "-DFIREBASE_ANDROID_STL=${firebaseAndroidStl}"
+                '-DFIREBASE_INCLUDE_GMA=ON'
 	    }
     }
   }

gma/gma_resources/build.gradle

@@ -15,7 +15,7 @@
 buildscript {
   repositories {
     google()
-    jcenter()
+    mavenCentral()
   }
   dependencies {
     classpath 'com.android.tools.build:gradle:3.3.3'
@@ -25,7 +25,7 @@ buildscript {
 allprojects {
   repositories {
     google()
-    jcenter()
+    mavenCentral()
   }
 }
 

gma/integration_test/build.gradle

@@ -17,7 +17,7 @@ buildscript {
   repositories {
     mavenLocal()
     maven { url 'https://maven.google.com'  }
-    jcenter()
+    mavenCentral()
   }
   dependencies {
     classpath 'com.android.tools.build:gradle:3.3.3'
@@ -29,7 +29,7 @@ allprojects {
   repositories {
     mavenLocal()
     maven { url 'https://maven.google.com'  }
-    jcenter()
+    mavenCentral()
   }
 }
 

scripts/gha/ui_testing/uitest_android/build.gradle

@@ -15,7 +15,7 @@
 buildscript {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:4.0.1'
@@ -28,7 +28,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }