Eliminates a few dependencies on the top-level common_types.h.
Bug: webrtc:7660
Change-Id: I91218a27e745e7e5e6b64dff9e09f6a6ab32d644
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/181480
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31920}