Upgrade XNNPACK to db2475b8af7e129b722167c3579ea743735fd733 am: 48d70eb6a7

Original change: https://android-review.googlesource.com/c/platform/external/XNNPACK/+/1541049

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I653c29fc354304d3713072a234484a5c61d275fb