commit b88795aadc636d14156791c2fc93af051d7e0d49
author Sailesh Nepal <sail@google.com> Tue Jul 15 14:53:27 2014 -0700
committer Sailesh Nepal <sail@google.com> Wed Jul 16 13:37:00 2014 -0700
tree 4ef9e116928a9e2942e22a67121252ddab510273
parent 664837f9a8a98f98876417a0bfff64834e8032fa

TTY: Telecomm

This CL makes the following changes:
  1. Added TtyManager. This class contains code that used
     to live in PhoneGlobals to listen to preferred TTY
     mode changes. Current TTY mode is based on the
     preferred mode, wired headset state, and device TTY
     support.

  2. Moved ownership of WiredHeadsetManager to CallsManager
     so that TtyManager can listen to headset plugged events.

  3. Added plumbing to TelecommServiceImpl to impement
     isTtySupported and getCurrentTtyMode.

  4. Added tty_enabled to config.xml. This is moved over
     from Telephony.

Change-Id: I652b095af30cc2732a06829dc23492e5355660da