fix(tracks) Replace the tracks directly on camera toggle.

Fixes an issue where p2p peer stops rendering remote video when the mobile client toggles camera. This happens only when the peer starts video muted.

react/features/base/tracks/actions.any.ts

         const localVideoTrack = getLocalVideoTrack(tracks)?.jitsiTrack;
         const currentFacingMode = localVideoTrack.getCameraFacingMode();
         const { localFlipX } = state['features/base/settings'];
-
-        /**
-         * FIXME: Ideally, we should be dispatching {@code replaceLocalTrack} here,
-         * but it seems to not trigger the re-rendering of the local video on Chrome;
-         * could be due to a plan B vs unified plan issue. Therefore, we use the legacy
-         * method defined in conference.js that manually takes care of updating the local
-         * video as well.
-         */
-        await APP.conference.useVideoStream(null);
-
         const targetFacingMode = currentFacingMode === CAMERA_FACING_MODE.USER
             ? CAMERA_FACING_MODE.ENVIRONMENT
             : CAMERA_FACING_MODE.USER;
 
         const newVideoTrack = await createLocalTrack('video', null, null, { facingMode: targetFacingMode });
 
-        // FIXME: See above.
-        await APP.conference.useVideoStream(newVideoTrack);
+        dispatch(replaceLocalTrack(localVideoTrack, newVideoTrack));
     };
 }