[flutter_driver] Fix tracing of startup events #59982
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When `retainPriorEvents` is passed as true, the current behavior still limits timeline events to the timestamp after `traceEvents` is called. This can cause startup events to be missing. This fixes it by passing null to `stopTracingAndDownloadTimeline` for the start and end time. Related: flutter#58430
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Sep 6, 2020
When `retainPriorEvents` is passed as true, the current behavior still limits timeline events to the timestamp after `traceEvents` is called. This can cause startup events to be missing. This fixes it by passing null to `stopTracingAndDownloadTimeline` for the start and end time. Related: flutter#58430
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Description
When
retainPriorEventsis passed as true, the current behavior still limits timeline events to the timestamp aftertraceEventsis called. This can cause startup events to be missing.This fixes it by passing null to
stopTracingAndDownloadTimelinefor the start and end time.Related Issues
#58430
b/158233207