There are multiple subtle issues with the current implementation:
1. setOperatingRate can cause a codec initialization even if the
renderer is disabled. This is not supposed to happen.
2. If the codec is released whilst the renderer is disabled, the
renderer can instantiate a new codec using the old format when
it's enabled again, only to immediately have to reconfigure or
release it if the actual format to be played is different.
3. Codec reuse does not take into account renderer configuration.
The specific case where this is problematic is if the video
renderer is re-enabled with a different tunneling session id.
The reused codec is then not configured correctly.
Also moved availableCodecInfos reset into releaseCodec for sanity.
Issue: #2826
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=217924592
f3b4575436