Remove ability to enable/disable phoneaccounts (5/6)

Enabling/disabling of phone accounts was only used for SIP accounts and
is no longer necessary for the purpose it was put in.

Bug: 17510811

Change-Id: I86187298b6f71e2315144dce5aa8e0672f7bbd7f
1 file changed
tree: 1bcc6b36248d09095eab8b061595440f552b6583
  1. InCallUI/