Try to find equivalent SuggestionsSpan when it has been updated.

Suggestion pickup was canceled when SuggestionsSpan corresponding
to the suggestion cannot be found.
This was a problem when suggestion is selected in extracted mode.
Selection is cleared just before creating SuggestionsPopup.
The selection update is reported to the original EditText and it
will invoke TextView#setExtractedText of the extracted one.
In this method, SuggestionSpans are replaced with the new
SuggestionSpans that usually have the same contents as the old
SuggestionSpans.

This CL re-enables "Replace" item in extracted mode.

Bug: 22038802

Change-Id: I74bb813b110fb2f633b8578790d14039755f2d79