The legacy broadcast may not be sent if wifi does not become the default network within timeout. CaptivePortalTest does not need wifi to be the default network at the start of the test, as it will be disconnected/reconnected immediately after anyway. Bug: 169106352 Test: atest CtsNetTestCasesLatestSdk:CaptivePortalTest Change-Id: Ie4ee6b3c3ed7c0d414fd3cc162d4183248120895