Support dex 37 for DexMerger

Make DexMerger take the largest dex-file version that is given.

Bug: 27538761
Bug: 27809626

(cherry picked from commit 3e7edcb6e2277e7311a2daaacebb0fa87b453d6f)

Change-Id: Iddca99477f5edbfc7b9cf3b3deda37fd84e4eeda
1 file changed