Do not classify error after stopping the camera as a startup failure.
Do not classify error after stopping the camera as a startup failure.

Calling event handlers when the camera is closing is safe because
CameraCapturer checks if the errors are coming from the current session.

Calling onFailure after camera has already started might lead to strange
behavior.

BUG=b/34112992

Review-Url: https://codereview.webrtc.org/2634973002
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#16101}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: c117e2ed79bf1a354bd611c761fd621a80058d72

Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk