Fix broken CtsVerifierReportLog handling. Fix incorrect type-cast in test end handler Replaced (only inadvertently working) mechanism for storing ReportLog results with explicit handling. Implement 'final' method(s) for generating ReportLog filename. Bug: 186561084 Bug: 186720548 Test: build, install, run AudioTests, Streaming Video Test... Change-Id: Ib69b48d1499c5cd0a74918ac82444b70f5599479