In case if primary encoder can't be instantiated (max number of
instances has reached, for example), use fallback encoder.
Bug: none
Change-Id: I477bdeb7af4dcce50e36b1804ffc6ad2ab004dfd
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/234500
Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Xavier Lepaul <xalep@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35161}