Mark classes as final that have final destructors

Having a final destructor prevents the class from being inherited from,
adding the designation final to the class makes this behavior more
explicit. This is required to re-enable the error for
-Wno-final-dtor-non-final-class.

Test: m
Merged-In: Ia3126d30e19edfd17f7c8da368e9763ca5501e84
Change-Id: Id1d7c607af9cca0109e1f763052894cf179f4af1