Conference listener onActiveSpeakerParticipantDevice signature has changed

app/src/main/java/org/linphone/ui/call/conference/viewmodel/ConferenceViewModel.kt

@@ -134,10 +134,11 @@ class ConferenceViewModel
         @WorkerThread
         override fun onActiveSpeakerParticipantDevice(
             conference: Conference,
-            participantDevice: ParticipantDevice
+            participantDevice: ParticipantDevice?
         ) {
             activeSpeaker.value?.isActiveSpeaker?.postValue(false)
 
+            if (participantDevice != null) {
                 val found = participantDevices.value.orEmpty().find {
                     it.device.address.equal(participantDevice.address)
                 }
@@ -151,6 +152,19 @@ class ConferenceViewModel
                     model.isActiveSpeaker.postValue(true)
                     activeSpeaker.postValue(model)
                 }
+            } else {
+                Log.w("$TAG Notified active speaker participant device is null, using first one that's not us")
+                val firstNotUs = participantDevices.value.orEmpty().find {
+                    it.isMe == false
+                }
+                if (firstNotUs != null) {
+                    Log.i("$TAG Newly active speaker participant is [${firstNotUs.name}]")
+                    firstNotUs.isActiveSpeaker.postValue(true)
+                    activeSpeaker.postValue(firstNotUs!!)
+                } else {
+                    Log.i("$TAG No participant device that's not us found, expected if we're alone")
+                }
+            }
         }
 
         @WorkerThread