Let iOS auto-signing tool handle Googler scenario (#16010)

* Let iOS auto-signing tool handle Googler scenario

* Forgot to update tests

packages/flutter_tools/lib/src/ios/mac.dart

diff --git a/packages/flutter_tools/lib/src/ios/mac.dart b/packages/flutter_tools/lib/src/ios/mac.dart
index 7356716..ff3d9d1 100644
--- a/packages/flutter_tools/lib/src/ios/mac.dart
+++ b/packages/flutter_tools/lib/src/ios/mac.dart
@@ -225,9 +225,9 @@
     return new XcodeBuildResult(success: false);
   }
 
-  String developmentTeam;
+  Map<String, String> autoSigningConfigs;
   if (codesign && buildForDevice)
-    developmentTeam = await getCodeSigningIdentityDevelopmentTeam(iosApp: app, usesTerminalUi: usesTerminalUi);
+    autoSigningConfigs = await getCodeSigningIdentityDevelopmentTeam(iosApp: app, usesTerminalUi: usesTerminalUi);
 
   // Before the build, all service definitions must be updated and the dylibs
   // copied over to a location that is suitable for Xcodebuild to find them.
@@ -287,8 +287,10 @@
     buildCommands.add('-quiet');
   }
 
-  if (developmentTeam != null) {
-    buildCommands.add('DEVELOPMENT_TEAM=$developmentTeam');
+  if (autoSigningConfigs != null) {
+    for (MapEntry<String, String> signingConfig in autoSigningConfigs.entries) {
+      buildCommands.add('${signingConfig.key}=${signingConfig.value}');
+    }
     buildCommands.add('-allowProvisioningUpdates');
     buildCommands.add('-allowProvisioningDeviceRegistration');
   }