Update top sites cookies

[blakeembrey]

Update to more closely reflect reality. Google was setting two different cookies of the same length which ended up being treated the same in testing, by making them different this more closely reflects reality.

Also added a few more sites to the examples and hard-coded the example.com empty.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (0ecf9bd) to head (5c15052).

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Additional details and impacted files

@@            Coverage Diff            @@
##            master      #182   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines          162       162           
  Branches        68        68           
=========================================
  Hits           162       162           

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