Add tmp overrides for google_sign_in/example

Author: blaugold

packages/google_sign_in/google_sign_in/example/pubspec.yaml

@@ -27,3 +27,14 @@ dev_dependencies:
 
 flutter:
   uses-material-design: true
+
+# FOR TESTING ONLY. DO NOT MERGE.
+dependency_overrides:
+  google_sign_in_android:
+    path: ../../../google_sign_in/google_sign_in_android
+  google_sign_in_ios:
+    path: ../../../google_sign_in/google_sign_in_ios
+  google_sign_in_platform_interface:
+    path: ../../../google_sign_in/google_sign_in_platform_interface
+  google_sign_in_web:
+    path: ../../../google_sign_in/google_sign_in_web