This is a reland of 46333dbf6211ea197965c30fdbecbeb62bc81e5b
Original change's description:
> Wire up proto-free event log format in encoder and parser.
>
> Encode ALR state events as an example. The ALR state unit tests pass with the new format, but the tests are not enabled in this CL since the other event types aren't encoded yet.
>
> Bug: webrtc:11933
> Change-Id: I3ba22778b55f24e2e2bd7d95bb9b17de29ef899f
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/234520
> Reviewed-by: Sebastian Jansson <srte@webrtc.org>
> Commit-Queue: Björn Terelius <terelius@webrtc.org>
> Cr-Commit-Position: refs/heads/main@{#35752}
Bug: webrtc:11933
Change-Id: Ia8b23cfb134b61c9ef02aa21189ecbd239783c40
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/248141
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35762}
01ef37c08e