GPS implementation (#216)

Implemented basic GPS support:
- GPS HAL
- GPS Service
- GPS Settings app

TactilityHeadless/Include/Tactility/hal/Device.h

@@ -22,7 +22,8 @@ public:
         Touch,
         SdCard,
         Keyboard,
-        Power
+        Power,
+        Gps
     };
 
     typedef uint32_t Id;
@@ -36,7 +37,7 @@ public:
     Device();
     virtual ~Device() = default;
 
-    Id getId() const { return id; }
+    inline Id getId() const { return id; }
 
     /** The type of device. */
     virtual Type getType() const = 0;