Most error messages in gradle_errors.dart assume a unix like path separator/environment #136763
Description
Examples
path separators
https://github.com/flutter/flutter/blob/master/packages/flutter_tools/lib/src/android/gradle_errors.dart#L114
https://github.com/flutter/flutter/blob/master/packages/flutter_tools/lib/src/android/gradle_errors.dart#L149
./gradlew vs ./gradlew.bat
https://github.com/flutter/flutter/blob/master/packages/flutter_tools/lib/src/android/gradle_errors.dart#L524