Relax measurement tests to allow 3 empty GnssData am: 5fdf11ffb9

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3286920

Change-Id: I349b736164d7538bf341bd6fd589bd9b564a3e5c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>