Update EventLogAnalyzer to not depend on builtin audio decoders. Bug: webrtc:8396, webrtc:10080 Change-Id: Ie02ed9cda6d4f11bfdf2e65eb6482283b7520738 Reviewed-on: https://webrtc-review.googlesource.com/c/114301 Reviewed-by: Alex Loiko <aleloi@webrtc.org> Reviewed-by: Ivo Creusen <ivoc@webrtc.org> Reviewed-by: Björn Terelius <terelius@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26026}