Fix bounds check when reading MapList of a dex file. am: 74c781dfd9

Original change: https://android-review.googlesource.com/c/platform/art/+/2375889

Change-Id: Ib7434bf89aeba8630d81f9f1b46c9144b9be9f2f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>