Fix NoVote/NoPreference on LayerHistory

Previous CL ag/30285441 was supposed to allow game default override if
the layervote is simply "NoPreference" category. However there was a bug
with the CL.

This CL fixes this and also removes the early skip of NoVote, in order
for explicit NoVote layers to not affect frame rate scoring even if
surface has drawing.

Bug: 378455432
Test: atest libsurfaceflinger_unittest
Test: manual test game with overlay
Test: manual test video with overlay
Test: manual test on both MRR and ARR
Flag: EXEMPT bugfix
Change-Id: Iba36cc89597f544bdc3311424f6e5d04439d7dc7