Migrate back from requery to framework sqlite

[mtotschnig]

Using requery since version 3.4.6, my conclusion is that the drawbacks outweigh the benefits.
The benefit is to be able to use newer sqlite features on all API levels:

• JSON support (not available on any Android version yet). We use this at the moment for returning the list of tags together with the main transaction list query.
• Windowing functions (available only from Android 11). These are not used at the moment, but are planned to be used in implementation of Running balances #239

The drawbacks:

• We are not using the latest requery version because of Performance on "big" data compared to native Android requery/sqlite-android#167
• Requery does not support localized sorting or searching (Implement case insensitive search for non-ascii letters #1140)

Since we changed the way we instantiate the database, we also see reports about race conditions during startup (unfortunately not reproducible on our side) that might not occur with FrameworkSQLiteOpenHelperFactory.