The goal of this CL is to make the CFDictionaryRef not dependent on a fixed number of properties, which will facilitate future work. No behavior change intended. Bug: None Change-Id: I32261d81eaa9b77380cecbdaefcbaeafde300f9a Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/257920 Auto-Submit: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com> Reviewed-by: Kári Helgason <kthelgason@webrtc.org> Commit-Queue: Daniel.L (Byoungchan) Lee <daniel.l@hpcnt.com> Cr-Commit-Position: refs/heads/main@{#36449}