The package must have at least one '.' separator

[PiN73]

Currently the plugin disallows creating an app with Android package name like "myorg.myproject"

Steps to Reproduce

• Open Android Studio with Flutter plugin installed
• Click "New Flutter Project"
• Input project name and organization of one word each, e.g "myproject" and "myorg"
• An error will occur: The package must have at least one '.' separator

However:

• Android allows it: must have at least two segments (one or more dots)
• Native Android project in Android Studio can be created with such name
• Flutter command-line tool also allows it: flutter create myproject --org myorg

Version info

Flutter 2.10.5 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 5464c5bac7
Engine • revision 57d3bac3dd
Tools • Dart 2.16.2 • DevTools 2.9.2

Android Studio Bumblebee | 2021.1.1 Patch 3
Flutter plugin 67.1.1
Dart plugin 211.7817

[stevemessick]

Our validation rules are a copy of what Android Studio used in 2018. Apparently they changed the rules, and we need to fix ours to be compatible. See io.flutter.utils.AndroidUtils.validateAndroidPackageName().