[NFC] Move MTE mode settings to a product variable. am: b30a72dd2d

Original change: https://android-review.googlesource.com/c/platform/external/android-clat/+/2623533

Change-Id: Ia1647610b710e2d884641c1edcaba066d959eb15
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>