Merge "Upgrade libpng to v1.6.44" into main am: cb503c51e6 am: b1aa1deccc

Original change: https://android-review.googlesource.com/c/platform/external/libpng/+/3269490

Change-Id: I5026f6f5e89a7e4476268d0a11532cb46930b4d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>