Android projects typically contain proguard-rules.pro files that contains a configuration on optimizing code during the build process. More details are available here and here. Android Studio creates the files with the default name proguard-rules.pro in each module directory.

Both // and # style comments should be supported, but I've only seen # in the wild and automatically generated template files.

My current proposal would be to add proguard-rules.pro files as a supported file to the comments with the PythonCommentStyle so the # is used.