refactor: use Position object as requestPosition parameter

app/src/main/aidl/com/geeksville/mesh/IMeshService.aidl

@@ -5,6 +5,7 @@ package com.geeksville.mesh;
 parcelable DataPacket;
 parcelable NodeInfo;
 parcelable MeshUser;
+parcelable Position;
 parcelable MyNodeInfo;
 
 /**
@@ -101,7 +102,7 @@ interface IMeshService {
     void commitEditSettings();
 
     /// Send position packet with wantResponse to nodeNum
-    void requestPosition(in int idNum, in double lat, in double lon, in int alt);
+    void requestPosition(in int idNum, in Position position);
 
     /// Send Shutdown admin packet to nodeNum
     void requestShutdown(in int idNum);

app/src/main/java/com/geeksville/mesh/model/UIState.kt

@@ -207,9 +207,9 @@ class UIViewModel @Inject constructor(
         }
     }
 
-    fun requestPosition(destNum: Int, lat: Double = 0.0, lon: Double = 0.0, alt: Int = 0) {
+    fun requestPosition(destNum: Int, position: Position = Position(0.0, 0.0, 0)) {
         try {
-            meshService?.requestPosition(destNum, lat, lon, alt)
+            meshService?.requestPosition(destNum, position)
         } catch (ex: RemoteException) {
             errormsg("Request position error: ${ex.message}")
         }

app/src/main/java/com/geeksville/mesh/service/MeshService.kt

@@ -1741,8 +1741,9 @@ class MeshService : Service(), Logging {
             stopLocationRequests()
         }
 
-        override fun requestPosition(idNum: Int, lat: Double, lon: Double, alt: Int) =
+        override fun requestPosition(idNum: Int, position: Position) =
             toRemoteExceptions {
+                val (lat, lon, alt) = with(position) { Triple(latitude, longitude, altitude) }
                 // request position
                 if (idNum != 0) sendPosition(time = 1, destNum = idNum, wantResponse = true)
                 // set local node's fixed position

app/src/main/java/com/geeksville/mesh/ui/DeviceSettingsItemList.kt

@@ -336,9 +336,8 @@ fun DeviceSettingsItemList(viewModel: UIViewModel = viewModel()) {
                 },
                 onSaveClicked = {
                     focusManager.clearFocus()
-                    if (positionInfo != ourNodeInfo?.position && positionInput.fixedPosition) positionInfo?.let {
+                    if (positionInfo != ourNodeInfo?.position && positionInput.fixedPosition)
-                        viewModel.requestPosition(0, it.latitude, it.longitude, it.altitude)
+                        positionInfo?.let { viewModel.requestPosition(0, it) }
-                    }
                     if (positionInput != localConfig.position) viewModel.updatePositionConfig { positionInput }
                 })
         }