[sensors][win] Implementation of motion sensors for Win platform

device/generic_sensor/generic_sensor_consts.h

Index: device/generic_sensor/generic_sensor_consts.h
diff --git a/device/generic_sensor/generic_sensor_consts.h b/device/generic_sensor/generic_sensor_consts.h
index 91b0c18853a784ce6687b73ef080e0d30399a1d4..63e3e1851d112b4b0cc5fed412d1e1ab5d88942b 100644
--- a/device/generic_sensor/generic_sensor_consts.h
+++ b/device/generic_sensor/generic_sensor_consts.h
@@ -5,6 +5,7 @@
 #ifndef DEVICE_GENERIC_SENSOR_GENERIC_SENSOR_CONSTS_H_
 #define DEVICE_GENERIC_SENSOR_GENERIC_SENSOR_CONSTS_H_
 
+#define _USE_MATH_DEFINES
 #include <math.h>
 
 namespace device {
@@ -18,6 +19,9 @@ constexpr double kRadiansInDegreesPerSecond = M_PI / 180.0;
 // Required for conversion from Gauss to uT.
 constexpr double kMicroteslaInGauss = 100.0;
 
+// Required for conversion from Milligauss to Microtesla.
+constexpr double kMicroteslaInMilligauss = 0.1;
+
 // Default rate for returning value of the ambient light sensor.
 constexpr int kDefaultAmbientLightFrequencyHz = 5;