[google_sign_in] Use implementation rather than api dependencies for plugin third-party dependencies.

packages/google_sign_in/CHANGELOG.md

@@ -1,3 +1,8 @@
+## 4.0.7
+
+* Switch from using `api` to `implementation` for dependency on `play-services-auth`,
+  preventing version mismatch build failures in some Android configurations.
+
 ## 4.0.6
 
 * Fixed the `PlatformException` leaking from `catchError()` in debug mode.

packages/google_sign_in/android/build.gradle

@@ -47,6 +47,6 @@ android {
 }
 
 dependencies {
-    api 'com.google.android.gms:play-services-auth:16.0.1'
+    implementation 'com.google.android.gms:play-services-auth:16.0.1'
     implementation 'com.google.guava:guava:20.0'
 }

packages/google_sign_in/pubspec.yaml

@@ -3,7 +3,7 @@ description: Flutter plugin for Google Sign-In, a secure authentication system
   for signing in with a Google account on Android and iOS.
 author: Flutter Team <[email protected]>
 homepage: https://github.com/flutter/plugins/tree/master/packages/google_sign_in
-version: 4.0.6
+version: 4.0.7
 
 flutter:
   plugin: