Dumpstate: don't dump HAL super classes.

Previously, if 'a.h.f@1.2::IFoo' was registered, dumpstate
woudl dump it three times as 1.0, 1.1, 1.2.

Fixes: 72123369
Test: bugreport

Change-Id: I121cf5b6ca5d3fe65e3922b07883320975fe5e0c