Made the initJvm method private

lib/aniyomi_bridge.dart

@@ -16,10 +16,10 @@ class AniyomiBridge {
   static late final JAniyomiBridge _jAniyomiBridge;
 
   AniyomiBridge() {
-    initJvm();
+    _initJvm();
   }
 
-  Future<void> initJvm() async {
+  Future<void> _initJvm() async {
     Directory supportDirectory = await getApplicationSupportDirectory();
     await _loadJarIfNeeded(supportDirectory);
     Jni.spawn(