realtime_zsl: Fix breakage due to portability am: d4638e74c7

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/google/camera/+/19558397

Change-Id: I86a14c61cded8177f91e1177adaeae4d9a0fd154
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>