Improvements

* Prevent users on Android N from attempting to use internal storage (#7838)
* produce - enabled_features feature (#7641)
* Make .env Dir.glob much less greedy (#7810)
* Update screengrab aar version (#7824)
* Revert "Scan Support for connected devices" (#7808)
* Scan Support for connected devices (#5159)
* Consistent support for DELIVER_USER and DELIVER_USERNAME env variables (#7806)
* Skip printing of empty lane context (#7799)
* add register_device to register a single ios device more easily (#7800)
* Fix syntax error in code sample (#7792)
* Fix frameit for Mac screenshots (#7790)

https://github.com/fastlane/fastlane/releases/tag/2.8.0
