t0lte: properly set routing and standby after call

Disabling the voice call route using voicecall_default_disable is not
sufficient since there are additional routes which are used during a
voice call, which have to be properly disabled. Also, set the input
device to standy which prevents the mic from not working for the
first time after a voice call.

This could also serve a potential fix for battery drain issues after
voice call.

Change-Id: Ie557b00e3979b588ea8e1b6b719de451f158935c
Merge "t0lte: properly set routing and standby after call" into android-4.4