fix(mobile): translation (no /api, experimental features) (#15600)

* initial /api removal

* translations /api

* experimental features

* japanese url update

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/assets/i18n/ja-JP.json

@@ -336,7 +336,7 @@
   "login_form_back_button_text": "戻る",
   "login_form_button_text": "ログイン",
   "login_form_email_hint": "hoge@email.com",
-  "login_form_endpoint_hint": "https://example.com:port/api",
+  "login_form_endpoint_hint": "http://your-server-ip:port",
   "login_form_endpoint_url": "サーバーのエンドポイントURL",
   "login_form_err_http": "http://かhttps://かを指定してください",
   "login_form_err_invalid_email": "メールアドレスが無効です",
@@ -670,4 +670,4 @@
   "viewer_unstack": "スタックを解除",
   "wifi_name": "Wi-Fiの名前(SSID)",
   "your_wifi_name": "Wi-Fiの名前(SSID)"
-}
+}