Don't create shadow-map if kObjPtrPoisoning is true am: 01b7cad2a1 am: fe85442aa7 am: 839f311e64

Original change: https://android-review.googlesource.com/c/platform/art/+/2334382

Change-Id: I2b103e4b13da8dadf3176d95a8ed986a34ad3972
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>