[NFC] Move MTE mode settings to a product variable. am: e073622c26 am: 99c19493f7

Original change: https://android-review.googlesource.com/c/platform/hardware/st/secure_element/+/2622660

Change-Id: Iec81f51cff731cc9bca885b50b1cc36f271a629e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>