Recover vdex regression on multidex.

As shown on golem, multidex apps regressed on vdex due
to having to call FastVerify on each dex file.

bug: 63467744
Test: test.py

(cherry picked from commit a6fc787e6bb07accff37ff9de059127b0c380153)

Change-Id: Ica46f84d758e4ff58776f80af802d59ac9d97558
1 file changed