make ReactMarker initialization one-shot

Reviewed By: AaaChiuuu

Differential Revision: D4996560

fbshipit-source-id: 020a850f72a2b5c2327b904cac3245d39e114508

ReactAndroid/src/main/java/com/facebook/react/bridge/ReactMarker.java

@@ -19,12 +19,11 @@ public class ReactMarker {
 
   private static @Nullable MarkerListener sMarkerListener = null;
 
-  public static void setMarkerListener(MarkerListener listener) {
-    SoftAssertions.assertCondition(
-      sMarkerListener == null,
-      "MarkerListener is being overwritten.");
+  public static void initialize(MarkerListener listener) {
+    if (sMarkerListener == null) {
       sMarkerListener = listener;
     }
+  }
 
   @DoNotStrip
   public static void clearMarkerListener() {