Support English UI, remove mediamtx, update hangover, fix build process, remove build files for other platforms

pubspec.yaml

@@ -39,13 +39,14 @@ dependencies:
   retry: ^3.1.2
   url_launcher: ^6.3.1
   shared_preferences: ^2.5.3
-  intl: ^0.20.2 #日期字符串转换
   clipboard: ^0.1.3
-  ffmpeg_kit_flutter_minimal: ^6.0.4
   wakelock_plus: ^1.3.1
   dynamic_color: ^1.7.0
   network_info_plus: ^6.1.3
   device_info_plus: ^11.3.3
+  flutter_localizations:
+    sdk: flutter
+  intl: any
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
@@ -60,13 +61,14 @@ dev_dependencies:
   # activated in the `analysis_options.yaml` file located at the root of your
   # package. See that file for information about deactivating specific lint
   # rules and activating additional ones.
-  flutter_lints: ^5.0.0
+  flutter_lints: any
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
 
 # The following section is specific to Flutter packages.
 flutter:
+  generate: true
 
   # The following line ensures that the Material Icons font is
   # included with your application, so that you can use the icons in