Puts the whole block in contiguous memory and reduce pointer look-up. The change has been verified to be bit-exact. Bug: webrtc:14089 Change-Id: I264aaf764bf53a29f23249105f704b2fdbd7e51c Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/263203 Reviewed-by: Sam Zackrisson <saza@webrtc.org> Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36983}