Test and fix bug checking status of secondary multidex files.

We were accidentally returning 'false' instead of 'true' to indicate a native
multidex file with an up-to-date primary dex file checksum but out-of-date
secondary dex file checksum is out of date.

Bug: 21022815
(cherry picked from commit a5a1c13a74225a1db3c54dc108fcd161b867bb00)

Change-Id: I0cc56d2d49858a4af91ca8b05aa8bd3c17bb44be
8 files changed