MLTS Arm Support Library - Remove the fp16 relaxing option. am: f46f87d39a am: d0b504e954 am: 5842374c7c am: 9d0e210582 am: 7d06b1a9fc

Original change: https://android-review.googlesource.com/c/platform/test/mlts/benchmark/+/2112517

Change-Id: I52a3e96bc9ea5c1f87f84e166cfaf2d2d6c632f5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>