Refresh overlay on new snapshot taken even if an old snapshot exists

Bug: 302041971
Test: Manual checking of overlay refreshes in bug repro case - live tile and select
Test: Manual checking of no additional overlay refreshes on non-live tile select
Test: Manually ensured no additional overlay refreshes while scrolling
Test: presubmit
Flag: EXEMPT bugfix
Change-Id: I5d455560d0bf816f86042078a662f06f5d1397bb