Shouldn't run Realm transactions/queries on the UI thread

[am-MongoDB]

From review by Realm engineering team:

RealmDataSource run transactions and queries on the UI thread. This could potentially block the UI, and is bad practise when using Sync.

[Sheeri]

@am-MongoDB where should the transactions and queries run?

[am-MongoDB]

They should be run in a worker thread

[lebedynskyi]

@Sheeri @am-MongoDB
On Android we use Kotlin. We can easely start using Coroutines.. Are you agree with it?

[am-MongoDB]

If coroutines are the correct way to ensure that slow operations don't block the UI, then yes, let's use them

[Sheeri]

@lebedynskyi I am also OK with coroutines. Does that unblock this ticket?