This patch integrates the new a-c BackgroundSyncManager, which is the
main entry point for interacting with Sync. Behind the scenes, it uses
WorkManager in order to sync configured syncable stores.
Current behaviour:
- sync runs on start, with a slight delay
- sync runs on a schedule few times a day, to lessen the startup sync burden
Also included is a basic UI integration in order to allow user to synchronize
on demand, and monitor sync state.
This patch integrates relevant a-c components, and updates the current Preferences
UI to allow signing-in and displaying basic account information (email, displayName).
Currently there's no Accounts UI, and so singing out or otherwise interacting with the
account isn't possible.
Emily Kager
Grisha Kruglov
Jeff Boek
Christian Sadilek
Sawyer Blatz
Colin Lee