Change the arrays to be continuous uint8_t arrays instead being of arrays of arrays (of arrays). Code size difference is 17K for arm, ~42K for arm64. New lookup algorithm, tailored for these two tables + tests. Instead of returning a raw pointer into the table, the algorithm returns an ArrayView, which includes size information for how much memory can be read. Change-Id: I000b094520bac944e518eb8b51d8dbef4670f5d7 Bug: webrtc:9102 Reviewed-on: https://webrtc-review.googlesource.com/65920 Reviewed-by: Stefan Holmer <stefan@webrtc.org> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org> Commit-Queue: Tommi <tommi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22736}