Don't create shadow-map if kObjPtrPoisoning is true Causes Dex2oatImageTest.TestExtension gtest to fail in 64-bit. Bug: 160737021 Test: run gtest Dex2oatImageTest.TestExtension Change-Id: Ic255b69c18495985bd407b332a6fbd9640bc86f5 (cherry picked from commit 01b7cad2a160e9d192eb7ddd5303255ab4c15278) Merged-In: Ic255b69c18495985bd407b332a6fbd9640bc86f5