Drop support for device configurable "compatibility WAL".

WAL as a journaling mode is no longer configurable on a
per-device basis. We preserve support for changing this value
via phenotype for now, but this will likely be removed in a
follow up once this change has been vetted.

Test: atest FrameworksCoreTests:android.database
Test: atest CtsDatabaseTestCases
Bug: 123352172
Change-Id: I163bad836b71770946ce12a8bfd19f362033ea83