ART: Fix test

Fixes a breakage from 38536287f61c9c0fc3bab8c1950cf8c74881482a. Ensure
that v4 is not undefined when an exception may be thrown (at the
new-instance).

Bug: 22331663
Bug: 22371999

(cherry picked from commit 7135ff0fdfd02796d40e7ef3c7527ff127512bd3)

Change-Id: Ice36ddda5ca92ea32fa88523dd616d4f2a61027e
1 file changed