Fix IllegalStateException when switchCamera of localVideoTrack (#725)

* Added calling surfaceTextureHelper.stopListening() inside onCapturerStarted to prevent crush when switchCamera in LocalVideoTrack. Added videoProcessor param into Local
.restartTrack to keep videoProcessor when restart the track.

* changeset

---------

Co-authored-by: davidliu <[email protected]>

Author: binkos

.changeset/cool-numbers-perform.md

@@ -0,0 +1,5 @@
+---
+"client-sdk-android": patch
+---
+
+Fix IllegalStateException when switchCamera of localVideoTrack

livekit-android-sdk/src/main/java/io/livekit/android/room/track/LocalVideoTrack.kt

@@ -256,7 +256,10 @@ constructor(
     /**
      * Restart a track with new options.
      */
-    fun restartTrack(options: LocalVideoTrackOptions = defaultsManager.videoTrackCaptureDefaults.copy()) {
+    fun restartTrack(
+        options: LocalVideoTrackOptions = defaultsManager.videoTrackCaptureDefaults.copy(),
+        videoProcessor: VideoProcessor? = null
+    ) {
         if (isDisposed) {
             LKLog.e { "Attempting to restart track that was already disposed, aborting." }
             return
@@ -290,6 +293,7 @@ constructor(
             options,
             eglBase,
             trackFactory,
+            videoProcessor
         )
 
         // migrate video sinks to the new track

livekit-android-track-processors/src/main/java/io/livekit/android/track/processing/video/VirtualBackgroundVideoProcessor.kt

@@ -137,6 +137,7 @@ class VirtualBackgroundVideoProcessor(private val eglBase: EglBase, dispatcher:
 
     override fun onCapturerStarted(started: Boolean) {
         if (started) {
+            surfaceTextureHelper.stopListening()
             surfaceTextureHelper.startListening { frame ->
                 targetSink?.onFrame(frame)
             }