Clean up database.sqlite flags

This change removes the following flags:
 * android.database.sqlite.concurrent_open_helper
 * android.database.sqlite.oneway_finalizer_close_fixed

The concurrent_open_helper should not have been exported but it
was and so cannot be removed.

Flag: EXEMPT removing android.database.sqlite.concurrent_open_helper
Flag: EXEMPT removing android.database.sqlite.oneway_finalizer_close_fixed
Bug: 424001157
Test: atest
 * CtsDatabaseTestCases
 * FrameworksCoreTests:android.database

Change-Id: If38d706ee81185d9050184ddd7b7c3e2cbdafc1d