Phone: Disable accelerometer sensor while in-call and screen UI is off

During an active ongoing call, on targets that support proximity sensors,
there is an approximate spike in the current waveform in the order of
1 Hz. Krait is woken up frequently by the sensors even when the Screen UI
is off while in-call. This fix ensures that by disabling the listener
in such a scenario (In-Call + Screen UI turned off) there is no spike
in power consumption

CRs-Fixed: 336244

Change-Id: I076f4674e8368267393ab181491eaf41239b7b02

Conflicts:
	src/com/android/phone/PhoneApp.java