Fix as-you-type formatter for new contacts

It looks like for new contacts onPostExecute() gets executed
before the target view is attacheed.

Removed the "is view attached?" check, as addTextChangedListener()
is actually safe to call even if the target view is not attached.

Bug 5362018
Bug 5385441

Change-Id: I178063c4e061fdcab27e25b9dfdc7fe25fd97153