We received lots of OpenGL leak reports from our production Android app. flutter app is an embedded module of our app, we destroy the flutter engine after the flutter page is finished.

After a hard investigation, we confirmed that OpenGL resources don't get released as expected after the flutter engine exited. The root cause is that releaseResourcesAndAbandonContext() is called on the platform thread, which should be on the rasterizer thread.

I'll create a fixing PR soon.