Fix flaky test for trel service discovery am: ffd3986c99 am: 986a6deca4

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

Change-Id: If871073c8777264b4fc67457e7b47948310e492b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>