修复运行flutter doctor提示以下错误方法
[!] Android Studio (version 4.2)
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
执行以下命令进行修复
ln -s ~/Library/Application\ Support/Google/AndroidStudio4.2/plugins ~/Library/Application\ Support/AndroidStudio4.2
cd /Applications/Android\ Studio.app/Contents/jre
ln -s "/Library/Internet Plug-Ins/JavaAppletPlugin.plugin" jdk
注意：AndroidStudio4.2中的4.2 为 Android Studio (version 4.2)中的版本号
再次运行flutter，一切正常了
