fix(all): update demo to NS v6.2; demo template cleanup

Author: Finn Gutteridge

demo/app/main-page.xml

@@ -1,16 +1,21 @@
 <Page xmlns="http://www.nativescript.org/tns.xsd" xmlns:maps="nativescript-google-maps-sdk" loaded="pageLoaded">
     <GridLayout>
-        <maps:mapView latitude="{{ latitude }}" longitude="{{ longitude }}"
-                      zoom="{{ zoom }}" minZoom="{{ minZoom }}" maxZoom="{{ maxZoom }}" bearing="{{ bearing }}" mapAnimationsEnabled="{{ mapAnimationsEnabled }}"
-                      tilt="{{ tilt }}" i-padding="50,50,50,50" padding="{{ padding }}" mapReady="onMapReady"
-                      markerSelect="onMarkerEvent" markerBeginDragging="onMarkerEvent"
-                      markerEndDragging="onMarkerEvent" markerDrag="onMarkerEvent"
-                      markerInfoWindowTapped="onMarkerEvent" markerInfoWindowClosed="onMarkerEvent"
-                      coordinateTapped="onCoordinateTapped"
-                      cameraChanged="onCameraChanged"
-                      indoorBuildingFocused="onIndoorBuildingFocused"
-                      indoorLevelActivated="onIndoorLevelActivated"
-                      cameraMove="onCameraMove">
+        <maps:mapView
+			latitude="{{ latitude }}" longitude="{{ longitude }}"
+			zoom="{{ zoom }}" minZoom="{{ minZoom }}" maxZoom="{{ maxZoom }}"
+			tilt="{{ tilt }}" bearing="{{ bearing }}"
+			mapAnimationsEnabled="{{ mapAnimationsEnabled }}"
+			i-padding="50,50,50,50" padding="{{ padding }}"
+			mapReady="onMapReady"
+			coordinateTapped="onCoordinateTapped"
+			markerSelect="onMarkerEvent"
+			markerBeginDragging="onMarkerEvent" markerEndDragging="onMarkerEvent" markerDrag="onMarkerEvent"
+			markerInfoWindowTapped="onMarkerEvent" markerInfoWindowClosed="onMarkerEvent"
+			cameraChanged="onCameraChanged"
+			cameraMove="onCameraMove"
+			indoorBuildingFocused="onIndoorBuildingFocused"
+			indoorLevelActivated="onIndoorLevelActivated"
+		>
             <maps:mapView.infoWindowTemplate>
                 <StackLayout orientation="vertical" width="200" height="150" >
                     <Label text="{{title}}" className="title" width="125"   />

demo/app/package.json

@@ -23,6 +23,7 @@
 	},
 	"homepage": "https://github.com/NativeScript/template-hello-world",
 	"android": {
-		"v8Flags": "--expose_gc"
+		"v8Flags": "--expose_gc",
+		"markingMode": "none"
 	}
 }