Fix flaky test for trel service discovery am: ffd3986c99

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3536080

Change-Id: I8473b80dcea4c2814908fc58bd459b4cda3b66ff
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>