[shared storage] Implement interestGroup()
Add interestGroups() to the shared storage worklet, to return the
Protected Audience interest groups associated with the
shared storage origin's owner, with some additional metadata.
Implement this behind a runtime feature, which is implicitly
controlled by a Finch flag.
Explainer PR: WICG/shared-storage#180
Spec PR(s):
Bug: 367992703
Binary-Size: Size increase is unavoidable.
Fuchsia-Binary-Size: Size increase is unavoidable.
Change-Id: I5fc5767fa53a91f021d64a871a6dd9cb88f4431c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5696046
Reviewed-by: Daniel Cheng dcheng@chromium.org
Commit-Queue: Yao Xiao yaoxia@chromium.org
Cr-Commit-Position: refs/heads/main@{#1369483}