Bring back AudioRecordingDisclosureBar

Enable AudioRecordingDisclosureBar, but add a config param for whether
to reveal the packages that are recording
(audio_recording_disclosure_reveal_packages). Disable showing the
packages.

Bug: 160676348
Test: manually ran on ADT3
Change-Id: I3debd00b890b4459b5f98320204c166a7c93043b