SuggestionSpans are preserved when picked.

This is the exception case: text replacement should NOT remove SuggestionSpans
when this is the result of a Suggestion pick in the popup.

Save them and restore them after the text replacement.
Only spans that entirely englobe the replaced region make sense after the
text replacement.

Change-Id: Ib18eb6437c3a63fd0e788ebd4565c8f42e83503b