Merge "Make tty_enabled to true by default." into nyc-dev am: fdafb79
am: 1f20370

* commit '1f2037069d00181ce253113ea0be84d565eb17ef':
  Make tty_enabled to true by default.

Change-Id: I3e1cd3eeb183c9ff761a68d58b3dc9f217c7ad14