Fix dex file lookup in DumpInfo when dex file locations have full paths. am: 53258d07c1 am: e5c3c82f8c

Original change: https://android-review.googlesource.com/c/platform/art/+/2059790

Change-Id: I33383e2ef941fa32a87c9ee00ba7ed88edb81ebf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>