Fix headset detection.

Original CM Commit below by Shelnutt2
Services.jar: Reworked computeNewHeadsetState function to set state in a

manor used in ics. This allows states such as 129 and 130, which are
used for 35MM_HEADSET to be correctly registered as a new state.

Change-Id: I3bd1ec17d0cd184593edf330f482f09396785e76