Fix Android NativeEventEmitter warnings

Adds method stubs required by React Native 0.65+, to address warnings that "new NativeEventEmitter was called with a non-null argument without the required [addListener/removeListeners] method"

android/src/main/java/com/rnziparchive/RNZipArchiveModule.java

@@ -510,4 +510,14 @@ private String getStackTrace(Exception e) {
     return sw.toString();
   }
 
+  @ReactMethod
+  public void addListener(String eventName) {
+    // Keep: Required for RN built in Event Emitter Calls.
+  }
+
+  @ReactMethod
+  public void removeListeners(Integer count) {
+    // Keep: Required for RN built in Event Emitter Calls.
+  }
+
 }