This reverts commit f09ab8889148c406551dea1643966e3331fde4aa, reversing
changes made to effc761e0ee4ea7ffb77f275b5ed650a7098d6f8.
This is being temporarily reverted to make it easier to release an
urgent fix for v10.15.1.
* Initial native notification implementation
* Simplify implementation
* Implementation based on RateLimitController
* Update controllers package
* Add notification to permission list
* Wire up correctly
* Remove snap_notify from the exclusion list