trace_processor: fix unittests on Android am: 76b0c54d6c
trace_processor: fix unittests on Android
am: 76b0c54d6c

Change-Id: I9ddea6b0cbe2f91602fb1a7ce51243200dbb9bd9

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