load android custom client for jvm startServer

src/flutter_ffi.rs

@@ -2116,12 +2116,16 @@ pub mod server_side {
         env: JNIEnv,
         _class: JClass,
         app_dir: JString,
+        custom_client_config: JString,
     ) {
         log::debug!("startServer from jvm");
         let mut env = env;
         if let Ok(app_dir) = env.get_string(&app_dir) {
             *config::APP_DIR.write().unwrap() = app_dir.into();
         }
+        if let Ok(custom_client_config) = env.get_string(&custom_client_config) {
+            crate::read_custom_client(custom_client_config);
+        }
         std::thread::spawn(move || start_server(true));
     }