DLS: fix loop calculation for 16-bit am: 97f70ed81d am: 4f077e4de6 am: e4bfb6ae2e

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/sonivox/+/18349826

Change-Id: Ie63b7235bf09a0b7460722a559a4e74fdd3e4b29
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>