Add additional logging to track HAL connection.

We perform lazy initialization of sensors. This leads to a possibility
when dumsys would report "No Sensors" for both the cases of the HAL
returning no sensors and us never actually having queried the HAL.

Bug: 37904273
Test: Sensors stream, new text for device init check shows up in
      dumpsys.

Change-Id: I705eb302811538797f96ac878c23149a483189a5
diff --git a/services/sensorservice/SensorService.cpp b/services/sensorservice/SensorService.cpp
index c5bbeee..d0e27d3 100644
--- a/services/sensorservice/SensorService.cpp
+++ b/services/sensorservice/SensorService.cpp
@@ -394,6 +394,7 @@
             }
         } else if (!mSensors.hasAnySensor()) {
             result.append("No Sensors on the device\n");
+            result.append("devInitCheck : %d\n", SensorDevice::getInstance().initCheck());
         } else {
             // Default dump the sensor list and debugging information.
             //