GitLab

It's a bit redundant to have a helper class to simply observe
the app and intent helper connections.

BUG=b:111367421
TEST=Bluetooth works

Change-Id: Ice714e43331c7590f8c08fd8ddaa59fbc31ec3e0
Reviewed-on: https://chromium-review.googlesource.com/c/1285087Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
Reviewed-by: Yury Khmel <khmel@chromium.org>
Commit-Queue: Qiyu Hu <qiyuh@google.com>
Cr-Commit-Position: refs/heads/master@{#600420}