Add missing push/pop shadow frame to artInterpreterToCompiledCodeBridge.

EnsureInitialized can cause GC to occur. Since the shadow frame wasn't
being pushed it meant that the references inside wouldn't get updated
by the moving garbage collector.

Bug: 12022098
Change-Id: I1f3fda41d14a2cf51cf524874de54d7766c362e9
1 file changed