Merge "Prevent integer overflow in function doProlog" into qt-dev am: 23374cb334 am: db39a9bc64 am: 32da840156 am: 19ee10132b am: d5fb0a7464

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/expat/+/18724031

Change-Id: I9f5b2cabaad947b9d6cd1d228dbf991e837411eb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>