[E2E test] Close Chrome popups during instrumentation run

Clear storage after test is finished to prevent hitting Chrome Windows restriction

Bug: 414363435
Flag: EXEMPT no flag is needed for e2e test
Test: atest PlatformScenarioTests:TabTearingDragAndDropTest

Change-Id: I1bd07a8feec33f23ec993e360b4f62a7afa6b609