Incident dump does not include current bucket

This is to avoid value metrics skipping buckets due to
DUMP_REPORT_REQUESTED, since if the metric needs to include the current
bucket under time constraints and needs to pull, it will drop the bucket
since it cannot pull.

Test: atest statsd_test
Bug: 158879346
Change-Id: Ia61e69530456ce2b3530add03ec6e068ffb25fb5