GitLab

Merge the current Assistant prefs controller logic into the
AssistantStateBase. Will also merge the logic of
VoiceInteractionController into this controller in the next change.

Bug: b/110211045
Test: Run existing tests
Change-Id: I1d3a8388fd66217baad44d7c7043ffd75830e42d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1727733
Commit-Queue: Yue Li <updowndota@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#684455}