Merge "Upgrade libxml2 to 7c06d99e1f4f853e3c5b307c0dc79c8a32a09855" am: f695d0ca98

Original change: https://android-review.googlesource.com/c/platform/external/libxml2/+/1493100

Change-Id: Ia9a40cd195f43a4cbe14efb9c0c2480a82392232