TIF: fix wrong config comparison & confusing method name

TvStreamConfig should do deep comparison in TvInputHardwareManager
where the object gets created from binder calls. In addition to this
fix, modify [aA]ddStream to [aA]ddOrUpdateStream so that the method
name better reflects what it does.

Bug: 18027719
Change-Id: I43fa668f91cb9433beee97ee31b4b1f58f21bfcf