[scudo] Untag pointer in iterateOverChunks am: a78a4a7f70 am: 88b862c65f am: 6388d32c27 am: 0cf79782d3

Original change: https://android-review.googlesource.com/c/platform/external/scudo/+/1729754

Change-Id: Iaa4468a8bc515d80404c580b111565840bf0c1ee