Filter Notifications : Adjust string

Change-Id: I797cef15fcbd2ebca1d411a71cae75aaf3b478f1
Automatic translation import

Change-Id: Ic8724edcccc194efa01ed56caad67c46909ba6c7
Use TYPICAL_PROXIMITY_THRESHOLD instead of mProximitySensor.getMaximumRange()

Presto's proximity sensor returns values: 0.0f(near) or 5.0f(far).
mProximitySensor.getMaximumRange() must return proximity sensor's availible range, but it always return 0, so mProximityThreshold is also 0.

So boolean positive = distance >= 0.0f && distance < mProximityThreshold;  positive will never be
true.
The cause of this problem is proprietary sensor.msm8660.so, it must set proper Range and Resolution for proximity sensor.

Change-Id: Idf23ac50c8ec52bad5fafadbdf8af69dd66c273e