Root Cause: Only happen when running `make RunSettingsRoboTests` not
happen when running `make RunSettingsRoboTests ROBOTEST_FILTER=HearingAidUtilsTest`. It is dependency test case fail when other tests also have AlertDialog pop up alerady.
Solution: Move ShadowAlertDialog reset before running each test, not after running each test.
Bug: 238829557
Test: make RunSettingsRoboTests
Change-Id: I32da4ee87580b4f475556905f7574b211a69b29b