Soundtrigger service: fix status reporting in loadSoundModel

Fix regression introduced by commit a188af07 cherry-pick
of fix for issue b/67310830

Bug: 64340921
Bug: 67310830
Test: repro steps in b/67310830
Change-Id: I718f47d913e1b98e567b7e1559f1f4cc1b29b231
Merged-In: Ie50b2e7c55fe9828a3fd8de6b31eb4a492791583
(cherry picked from commit 82acb6c905959c92745f4f98e237ccd9ce64be28)