Summary:
`FKUserDefaultsPlugin` is initialized with an `appSuiteName` but doesn't use this to monitor the app suite user defaults. This adds that capability.
In Flipper, "App Suite UserDefaults" defaults will show up in the drop down selector for user defaults.
Reviewed By: priteshrnandgaonkar
Differential Revision: D14922399
fbshipit-source-id: 3876976ccd0968fdec35f7605107202e1f9d7cee
7bbb8c10c4