Merge pull request Baseflow#526 from Baseflow/scoped_storage_permission

Added MANAGE_EXTERNAL_STORAGE permission

Merge pull request Baseflow#528 from Baseflow/system_alert_windows_pl…

…atform_interface

Added support for SYSTEM_ALERT_WINDOW permission

Merge pull request Baseflow#524 from Baseflow/scoped_storage_platform…

…_interface

Added manage external storage permission

Merge pull request Baseflow#522 from Baseflow/equality

Upgrade to permission_handler_platform_interface 3.1.3

Merge pull request Baseflow#521 from Baseflow/update_changelog

Fixed typos

Merge pull request Baseflow#513 from Baseflow/issue/43_platform_inter…

…face

Allow checking serviceStatus for notification permission

Merge pull request Baseflow#490 from Baseflow/implementing_test_permi…

…ssion_handler

Added test

Merge pull request Baseflow#485 from Baseflow/implementing_tests

Added tests

Merge branch 'develop'

Merge branch 'develop'