Fix byte and char Get32

8 bit and 16 bit fields aren't necessarily 32 bit aligned due to
field packing. This was causing SIGBUS for hprof dumping some apps.

Bug: 19627999

(cherry picked from commit 2ff8da6a4d44bcf6a72dca1b5294a72297c5ce26)

Change-Id: If549412fc4d62c55bb6a46f11658fc60b822a27e
1 file changed