trace_processor: Swap sense of bad CHECK
trace_processor: Swap sense of bad CHECK

I accidentally swapped the sense of a CHECK while doing what
was supposed to be a noop refactor (aosp/1679771).
This switches it back.

Bug: 187933901
Change-Id: Ice8fcb038f38e066fc2bf177110279424fc7cd3f

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