Room 2.8.0-alpha01

Added a new artifact androidx.room:room-sqlite-wrapper which contains APIs to get a SupportSQLiteDatabase wrapper of RoomDatabase with a configured SQLiteDriver. To get the wrapper use the new extension function RoomDatabase.getSupportWrapper(). This is a compatibility artifact to maintain usages of SupportSQLiteDatabase, usually obtained from RoomDatabase.openHelper.writableDatabase, even if the Room database is configured with a SQLiteDriver. This wrapper is useful for incremental migration of codebases who wish to adopt SQLiteDriver but have extensive usages of the SupportSQLite APIs yet they want to take advantage of the BundledSQLiteDriver.