Dump Dex file checksums for profman --dump-only

Make it easier to diagnose mismatched dex checksums. Add checksum
verification in ProfileCompilationInfo::DumpInfo. Some refactoring
to remove unnecessary code.

Bug: 116509324
Test: test-art-host-gtest

Change-Id: I11fb8d1aa987c0f0a975ef6dcb811bf41d58fad6