Room 2.3.0

Built-in Enum Support: Room will now default to using an Enum to String and vice versa type converter if none is provided. If a type converter for an enum already exists, Room will prioritize using it over the default one. Query Callback: Room now offers a general callback API RoomDatabase.QueryCallback, for when queries are about to execute, which can be useful for logging in debug builds. The callback can be set via RoomDatabase.Builder#setQueryCallback(). Pre-packaged Improvement: Room now has APIs for creating a database using a pre-packaged database read from an input stream. This allows for cases such as when the pre-package database is gzipped. Provided Type Converters: Room now has APIs for providing instances of type converters such that the app can control their initialization. To mark a type converter that will be provided to Room use the new annotation @ProvidedTypeConverter. RxJava3 Support: Room now supports RxJava3 types. Similar to RxJava2 you can declare DAO methods whose return type are Flowable, Single, Maybe and Completable. Additionally a new artifact androidx.room:room-rxjava3 is available to support RxJava3. Paging 3.0 Support: Room will now support generating implementations for @Query annotated methods whose return type is androidx.paging.PagingSource.