Filter the lastAccessTime == 0 in urlbar suggestions

[darkdh]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

fix #5183

Auditors: @bbondy, @bsclifton

Test Plan:

1. Import bookmarks
2. They should not appear in urlbar suggestions until you visit them

[bbondy]

++