Call ChipDeleted when RecipientEditTextView's parent handles a delete.

In some configurations, delete character is causing onKeyDown() to be
called, which handles the chip deletion instead of
RecipientTextWatcher#onTextChanged. We want to call
RecipientChipDeletedListener in these cases, similar to other chip
deletion events.

Bug: 34338361
Change-Id: I4c66c007646a36004ee9479b8cc9f78eab60c88d