ART: Check alignment of section offsets

Make sure the sections mentioned in the header are aligned according
to the Dalvik File Format specification.

Ensure the same for annotations.

Bug: 27275385
Bug: https://code.google.com/p/android/issues/detail?id=201384

(cherry picked from commit b512c0e5)

Change-Id: Ifdd98377f8468e78c1c2198223ad58cab302dd37