gpuDrawTime should default to 0 when endTime is unknown

gpuDrawTime should default to 0 when endTime is unknown, otherwise we
will treat nagative duration as infinity in JankTracker::finishGpuDraw.

Test: atest com.android.server.cts.GraphicsStatsValidationTest#testJankyDrawFrame
Bug: b/168262403
Change-Id: I4bb61074e6917ec7ef4af429f48487ae34f8ad0b
1 file changed