Dynamically stop services with multiple interfaces

This fixes a couple workflow bugs with dynamic services that had multiple interfaces in use at once. Attempting to stop one could affect the reference count of the other, and re-adding it after a failed removal yielded duplicate registrations.

Bug: 146903840
Test: aidl_lazy_test
Change-Id: I7ec80a280dabf7c576b7b00dff404a68c24ae5f1