a new issue about opengl es

[wangcker]

flutter_scene upgrade to 0.9.2 .the nodes are all invisible and no error occured. in huawei mate20 .

log:
I/flutter ( 4919): MSAA is not currently supported on this backend.
E/libEGL ( 4919): call to OpenGL ES API with no current context (logged once per thread)
I/DecorView: pkgName:*** old windowMode:1 new windoMode:1, isFixedSize:false
I/flutter ( 4919): Unpacking Scene (nodes: 852, textures: 23)
I/flutter ( 4919): Total texture count: 23
I/chatty ( 4919): uid=10370() identical 531 lines
I/flutter ( 4919): Total texture count: 23
I/flutter ( 4919): Total texture count: 23
I/chatty ( 4919): uid=10370() identical 402 lines
I/flutter ( 4919): Total texture count: 23
I/flutter ( 4919): Total texture count: 23
I/chatty ( 4919): uid=10370() identical 33 lines
I/flutter ( 4919): Total texture count: 23
I/flutter ( 4919): Unpacking Scene (nodes: 874, textures: 26)
I/flutter ( 4919): Total texture count: 26
I/chatty ( 4919): uid=10370() identical 92 lines
I/flutter ( 4919): Total texture count: 26
I/flutter ( 4919): Total texture count: 26
I/chatty ( 4919): uid=10370() identical 28 lines
I/flutter ( 4919): Total texture count: 26
I/flutter ( 4919): Total texture count: 26
I/flutter ( 4919): Total texture count: 26
I/flutter ( 4919): Total texture count: 26
I/chatty ( 4919): uid=10370() identical 352 lines
I/flutter ( 4919): Total texture count: 26
I/flutter ( 4919): Total texture count: 26
I/chatty ( 4919): uid=10370() identical 147 lines
I/flutter ( 4919): Total texture count: 26
I/flutter ( 4919): Total texture count: 26
I/chatty ( 4919): uid=10370() identical 141 lines
I/flutter ( 4919): Total texture count: 26
I/flutter ( 4919): Total texture count: 26
I/chatty ( 4919): uid=10370(***) identical 192 lines
I/flutter ( 4919): Total texture count: 26