Remove stack protector from checkjni functions too am: f531f197b8

Original change: https://android-review.googlesource.com/c/platform/art/+/2321421

Change-Id: I1cc8a664f9b7483c6d9cbf4c38171c70910a6b73
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>