Implement stationary-heartbeat location monitor in order to keep...

Implement stationary-heartbeat location monitor in order to keep proximity-detection alive.  Android 4.4 proximity detectors are supposed to fire after 4min while suspended but I don'tt see that happening.  This Alarm of fixed time to ping the GPS at regular interval seems to make stationary-exit work well.  Also turned on CellLocationChange event-listener but that only works in foreground unfortunately.  IF that actually worked, we could have something similar to ios Significant Changes system.  This is why we have to poll the GPS regularly while in stationary-mode