DLS: fix loop calculation for 16-bit am: 97f70ed81d am: ff2ab4d706

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

Change-Id: I8c4d636bb2389c6ece1562125a7e493485713a98
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>