Report optimized/unoptimized targets correctly

Always report every target that gets built as unoptimized, and only
report targets that wouldn't get built as optimized. Previously when
test discovery succeeded only targets that get built were getting
reported (as optimized when those were the unoptimized ones), and
targets that wouldn't get built were not being reported at all (when
those would be the optimized targets).

Test: Presubmit
Bug: 372973116
Change-Id: I0b22b57654bba90d9eb398651b09ae0f65df0d5c