handle upload file, improve asset ui, fix messages

V2rayNG/app/src/main/res/values-zh-rCN/strings.xml

@@ -85,6 +85,7 @@
     <!-- PerAppProxyActivity -->
     <string name="title_user_asset_add_url">添加资产网址</string>
     <string name="msg_file_not_found">文件未找到</string>
+    <string name="msg_remark_is_duplicate">备注已经存在</string>
     <string name="msg_dialog_progress">正在加载</string>
     <string name="menu_item_search">搜索</string>
     <string name="menu_item_select_all">全选</string>