Clean up listeners when view is destroyed.

When the answer screen is shown and destroyed with a back button and then
re-shown via notifications, a new AnswerPresenter is created.  But the old
presenter has not been removed as a listener.

Bug: 10566547
Change-Id: I68c621fee81017fa5d0e3e9dde56fabedc3b1d8d
1 file changed
tree: 3ab1745c8bb2ef78206ad8f27915947f354d3685
  1. InCallUI/