Make it not to go to sleep when changing TV's input to the others.

- Previously, we decided to make it go to sleep when changing TV's input
  to the others.  But, we found that the current molly couldn't wake up by
  CEC commands actively.  So, we'll revert the decision.
- In addition, during investigating this issue, we found that currently
  molly couldn't work with Samsung (SS) TV harmoniously.  SS TV will send
  <RoutingChange> and <RequestActiveSource> when it wakes up.  If there
  is no <ActiveSource> response, then it will change the input to the
  internal.  This CL handles this issue also.

Bug: 16803105
Change-Id: I5179561775b186b486fc3f2a042e759fcb07451b