Cleaning up KeyguardClockPositionAlgorithm and its tests

This clean up was made as part of ag/15432528 but it was later reverted, thus this CL only with the clean up part.

Bug: 193654214
Test: KeyguardClockPositionAlgorithmTest
Change-Id: I5f3643c605336de046f27cc9cb5b11e31fb63309
4 files changed