realtime_zsl: Fix breakage due to portability Bug: 240347618 Test: presubmit Change-Id: I907173b7ad5ee3f4d8498fbefe510aa89bb92688 (cherry picked from commit 789eb838415a0494c9555946ca91a67d0c4ff645) Merged-In: I907173b7ad5ee3f4d8498fbefe510aa89bb92688