Remove some unused methods in BSI

BatteryStatsImpl has some recently added methods where formerly we used
A()
now we use
A(int elapsedTime)

Often those old A() calls are now unused and can be removed.

Test: compiles
Test: FrameworksCoreTests
Test: FrameworksServicesTests
Change-Id: I4cac7879db47811ed92455470a660a675db6a4c7