fix: change generateNewObjectId to static native method

Author: edusperoni

test-app/runtime/src/main/java/com/tns/Runtime.java

@@ -53,7 +53,7 @@ private native void initNativeScript(int runtimeId, String filesPath, String nat
     private native void createJSInstanceNative(int runtimeId, Object javaObject, int javaObjectID, String canonicalName);
 
     @CriticalNative
-    private native int generateNewObjectId(int runtimeId);
+    private static native int generateNewObjectId(int runtimeId);
 
     @FastNative
     private native boolean notifyGc(int runtimeId);