Merge "Prevent XML_GetBuffer signed integer overflow" into qt-dev am: 517a01093c am: 96988ebf72 am: 86bef208ce am: f837e1fbb5 am: be9973f663 am: 878121a306

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/expat/+/18718601

Change-Id: I6006c5e56d23479fde8b1cf1cb66f98b6dae87e5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>