component/bt: bugfix for A2DP in dropping of media packet when data buffer size goes beyond threshold

components/bt/bluedroid/btc/profile/std/a2dp/btc_media_task.c

@@ -901,6 +901,7 @@ UINT8 btc_media_sink_enque_buf(BT_HDR *p_pkt)
 
     if (GKI_queue_length(&btc_media_cb.RxSbcQ) >= MAX_OUTPUT_A2DP_FRAME_QUEUE_SZ) {
         APPL_TRACE_WARNING("Pkt dropped\n");
+        return GKI_queue_length(&btc_media_cb.RxSbcQ);
     }
 
     APPL_TRACE_DEBUG("btc_media_sink_enque_buf + ");