Upgrade libpng to v1.6.43 This project was upgraded with external_updater. Usage: tools/external_updater/updater.sh update external/libpng For more info, check https://cs.android.com/android/platform/superproject/+/main:tools/external_updater/README.md Test: TreeHugger Change-Id: Id7a4169e3ebccb5c23fefc86d558e7586e0cadc4