Update BatteryInfo to include averageTimeToDischarge

This updates the Estimate data model class as well as the places
it is used to populate the new field when available.

Test: robotests
Bug: 74020365
Change-Id: Ibcecf933819f8b8cd8514205768569e9bd7d1517
(cherry picked from commit 453db0cd)
Merged-In: 453db0cd