Post updateClockViews when called within onLayout

updateClockViews may change the view hiearchy and
calling it within onLayout was causing view measurement issues.

remove chatty debugging logs

Test: manually force updateClockViews to occur in onLayout,
  see the clock is cutoff when notifications are hidden (can use adb:
  adb shell locksettings require-strong-auth
  STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN) w/o change, with this
  change, the clock is never cutoff
Bug: 222260948
Bug: 233081863
Change-Id: I4ea5dae1dc8018478cc98e5e2520ef2afd2fdc58