As part of migrating the plugins, we've needed to add in a Gradle afterEvaluate block that includes some extra libraries in cases where we're on older versions of Flutter and they're not exposed by the engine: https://gist.github.com/blasten/78e97b1d97a736d7e8dcc3f520cea3f0.

We've chosen to do this instead of including them in just plain old dependencies because plugins really shouldn't be specifying these dependencies themselves. We're only including them at all to prevent compile failures on older Flutter versions.

Once the missing dependency fix rolls to Flutter stable we should remove them.