ui: don't throw exception for zero-duration instants am: df5b7cb44e
ui: don't throw exception for zero-duration instants am: df5b7cb44e

Original change: https://android-review.googlesource.com/c/platform/external/perfetto/+/1424332

Change-Id: If72c55e04e30ece415f4b2aa57596bbbd9f2b0e9

google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto