List elements are separated by a |. If the key is given without a : we
treat that as a empty list.
We also support parsing multiple lists as a list-of-structs, see the
unit test for usage examples.
Bug: webrtc:9346
Change-Id: I32d3ce612fef476b1c481c00a893d7fa2f339e92
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/130464
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Jonas Olsson <jonasolsson@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27560}
