use static const instead of #define (DIS)ALLOW am: a09c2bbe49 am: f142ddf4b1

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

Change-Id: Ia532f4470f78b3783c4b2da9a399981c3845123a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>