Extend the timeout to 5 in AlwaysOnHotwordDetectorChangesTest

When the test shutdowns the service on TV, onShutdown was triggered
too slow or it was not triggered. Extend the timeout value to reduce
the flaky rate first.

Test: atest CtsVoiceInteractionHostTestCases
Bug: 247304272
Change-Id: I6aae466ca5d7ab510ac1dc17d25a07c0f8e6e029
1 file changed