GitLab

For dual internal mic devices, the internal mic entry in the ui
is a stub. Need to tweak the visibility logic to make sure the
slider for the stub internal mic shows up correctly.

Bug: 1083040
Change-Id: I14d2ef7733142539ae9432bec6a265b553c62d6a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2205980Reviewed-by: Jenny Zhang <jennyz@chromium.org>
Commit-Queue: Ahmed Mehfooz <amehfooz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#769892}