Regsiter BT HAL services if they are declared

Since finder/ranging/lmp_event HAL services are new and their interfaces
are not frozen yet, they can't register services in -next-
configuration.

Bug: 322204309
Bug: 319155748
Test: run CF in -next- build
Change-Id: I4729d8763842c719682ce0124bbaaed86164a7d5