[automerger skipped] Empty Merge Android U (ab/10368041) am: 15b4d3ddb9 -s ours

am skip reason: Merged-In I78ad12417bd62fb4f64085149b28c515abd59172 with SHA-1 dfb0b6e960 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libpng/+/24087865

Change-Id: I370da8227350c70363a2ee678d52deee0b2c7bf5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>