ios: Annotate pre-existing DanglingUntriaged raw_ptr/raw_ref fields

First round, attempting to bring up ios-simulator bot.

This CL was uploaded by git cl split.

R=mpearson@chromium.org

DanglingUntriaged-notes: greening ios-simulator bot for enable_dangling_raw_ptr_checks
Bug: 424376811
Change-Id: I153eb5eb57b3444ce607a89011119f8207cbefaa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6940926
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Auto-Submit: Justin Cohen <justincohen@chromium.org>
Commit-Queue: Mark Pearson <mpearson@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1514600}
NOKEYCHECK=True
GitOrigin-RevId: 77b0da6f2f1c3815e304a13da00843935ff37c29