Fix one mul-overflow issue

When minInterval is set to 5s or larger,
mul-overflow will happen when we convert
minInterval from second to nano second in
getElapsedRealtimeEstimateNanos function.
Change the type of time between fix parameter
to int64_t.

Change-Id: Ifbe180b35298b78099daf496354086d5e3403e7b
CRs-Fixed: 2848319
2 files changed