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)
diff --git a/services/stats/StatsHal.cpp b/services/stats/StatsHal.cpp
index 80c3b65..ae0a984 100644
--- a/services/stats/StatsHal.cpp
+++ b/services/stats/StatsHal.cpp
@@ -58,7 +58,7 @@
     std::vector<int32_t> buckets = chargeCycles.cycleBucket;
     int initialSize = buckets.size();
     for (int i = 0; i < 10 - initialSize; i++) {
-        buckets.push_back(-1); // Push -1 for buckets that do not exist.
+        buckets.push_back(0); // Push 0 for buckets that do not exist.
     }
     android::util::stats_write(android::util::CHARGE_CYCLES_REPORTED, buckets[0], buckets[1],
             buckets[2], buckets[3], buckets[4], buckets[5], buckets[6], buckets[7], buckets[8],