Sort out permission around "instant text response"

- Remove SEND_SMS_NO_CONFIRMATION

- Add SEND_RESPOND_VIA_MESSAGE Permission
  This permission is held by the phone and applications that want to
  handle respond-via-message should require this permission of the
  sender.  This permission is signature/system and currently only held
  by the Phone app.

Bug: 5108429
Change-Id: Ib611368d488de2f8e1e853f550eb2c654305eda4