NAVAND-1001: share lastPlayedInstructions between MapboxAudioGuidanceVoice instances

Author: dzinad

libnavui-voice/src/main/java/com/mapbox/navigation/ui/voice/api/MapboxAudioGuidance.kt

@@ -27,6 +27,7 @@ import kotlinx.coroutines.flow.filter
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.flatMapConcat
 import kotlinx.coroutines.flow.flatMapLatest
+import kotlinx.coroutines.flow.flatMapMerge
 import kotlinx.coroutines.flow.flowOf
 import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.flow.updateAndGet
@@ -127,8 +128,8 @@ internal constructor(
     private fun audioGuidanceFlow(
         mapboxNavigation: MapboxNavigation
     ): Flow<MapboxAudioGuidanceState> {
-        return mapboxNavigation.audioGuidanceVoice().flatMapLatest { audioGuidance ->
-            var lastPlayedInstructions: VoiceInstructions? = null
+        var lastPlayedInstructions: VoiceInstructions? = null
+        return mapboxNavigation.audioGuidanceVoice().flatMapMerge { audioGuidance ->
             mutedStateFlow.flatMapLatest { isMuted ->
                 val voiceInstructions = mapboxVoiceInstructions.voiceInstructions()
                     .map { state ->