Dart Reply onERROR crach

[arodriguezgb]

This crash is happening on the 1.3.3 , it was happening before. I forgot I fixed it, its just a try and catch on the onError method on RemoteManagedMediaPlayer. However I dont know where do you want to save, or sotore or display the exception so I will just add it blank with my PR.

[arodriguezgb]

@monkeyswarm this is the PR
#101