use static const instead of #define (DIS)ALLOW am: a09c2bbe49

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2777123

Change-Id: Ie8a65efc8a1458a24225039546609e3c8828efad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>