* Add an observed attribute to address-picker to render when address-fields is changed
* Add a filter step to address-picker, to exclude addresses that represent duplicates given the requested fields
* Filter out addresses that do not contain one or more of the requested fields
* Use a default set of fields to establish duplicates and meet the bar for adding an address as an option
MozReview-Commit-ID: 7lg4suNHv60
bd65a65911