Enable selecting device whose power status is not on

DeviceSelect() returns immediately if the active routing path
is selected even if the device is turned off and not displaying
anything.

This fix allows device to be selected again if target device's
power status is not on in order to wake it up, hence improve
the user experience.

Bug: 19724238
Change-Id: I3b62b9aa0aecaf2957a445d82e966d52b9be6879