Send TV app the intent for the new active source

When signalled by an external CEC device about to become a new active
source, TIF(TvInputHardwareManager) sends an intent for TV app to tune to
the input mapped to the device. For non-CEC devices or MHL device
the device info comes with port ID only, which should be used to find
the right input.

Change-Id: I71c8454fead037d880ee440b0a8d64dd361ed558