Merge pull request #3386 from riadvice/fix-switch-back-audio-profile

...button/freeswitch/voice/freeswitch/ConnectionManager.java

...on/freeswitch/voice/freeswitch/FreeswitchApplication.java

...oice/freeswitch/actions/TransferUserToMeetingCommand.java

akka-bbb-fsesl/src/main/resources/application.conf

akka-bbb-fsesl/src/main/scala/org/bigbluebutton/Boot.scala

...rc/main/scala/org/bigbluebutton/SystemConfiguration.scala