sensorservice: ProximitySensor needs to report correct sensor state. am: cebf2e6c am: cc7f899e am: 7f947e91

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/15459770

Change-Id: I7f27183e375f5b101a9be53699bdc5dd2837e5bb