[NFC] Move MTE mode settings to a product variable. am: b895507094

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/bpf/+/23716468

Change-Id: Ib081c3bad63c967f794c6ceb0f814ca28dac4384
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>