[Microphone Indicator] Don't show if there are no microphones

Authored by broulik on Aug 6 2019, 11:23 AM.

Description

[Microphone Indicator] Don't show if there are no microphones

If there are no microphones, even if there are recording streams, there's nothing for them to record other than sound playback.

CCBUG: 410637

Differential Revision: https://phabricator.kde.org/D22961