Add multiple configuration options for a minimized build (GPS,WiFi,BT,MQTT,Screen). (#3469)

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>

src/modules/PositionModule.cpp

@@ -1,3 +1,4 @@
+#if !MESHTASTIC_EXCLUDE_GPS
 #include "PositionModule.h"
 #include "Default.h"
 #include "GPS.h"
@@ -418,4 +419,6 @@ void PositionModule::handleNewPosition()
             lastGpsSend = now;
         }
     }
-}
+}
+
+#endif