Assign 0 to buckets that do not exist

Bug: 166163010
Signed-off-by: Jenny Ho <hsiufangho@google.com>
Change-Id: Icec3984fe51dee411e8413cd6b44d67a88eaef9c
(cherry picked from commit 05a6e79f3f919e1e223445a98deb6160b064aae6)
1 file changed