A refactoring (https://webrtc-review.googlesource.com/c/src/+/196520) of decoder metadata handling introduced a bug which causes us to log an info-level entry for every frame decoded if the implementation changes during runtime (e.g. due to software fallback). This CL fixes that to avoid spamming the logs. Bug: webrtc:12271 Change-Id: I89016351b8752b259299c4cf56c6feddcca43460 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/211664 Reviewed-by: Åsa Persson <asapersson@webrtc.org> Commit-Queue: Erik Språng <sprang@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33451}