Metrics: Reduce reporting frequency to 5s
Metrics: Reduce reporting frequency to 5s

TBR=jcgregorio
BUG=skia:4921

Review URL: https://codereview.chromium.org/1679273002

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot