feat!: view callback and layout functionality improvements (#239)

Fixes the NavigationView callback registration issue when using multiple view instances.
Resolves navigation view scaling issues by removing the mandatory height and width properties and adding support for an optional style property (breaking change). This allows developers to use flex or width/height parameters with percentage values.

BREAKING CHANGE: The height and width properties have been removed from NavigationView in favor of an optional style property.

Author: jokerttu

README.md

@@ -88,8 +88,6 @@ in an unbounded widget will cause the application to behave unexpectedly.
     // Permissions must have been granted by this point.
 
     <NavigationView
-        width={navViewWidth}
-        height={navViewHeight}
         androidStylingOptions={{
             primaryDayModeThemeColor: '#34eba8',
             headerDistanceValueTextColor: '#76b5c5',
@@ -142,6 +140,16 @@ const requestPermissions = async () => {
 };
 ```
 
+### Changing the NavigationView size
+By default, `NavigationView` uses all the available space provided to it. To adjust the size of the NavigationView, use the `style` prop.
+
+```tsx
+    <NavigationView
+        style={{width: 200, height: 50%}}
+        ...
+    />
+```
+
 ## Contributing
 
 See the [Contributing guide](./CONTRIBUTING.md).

android/src/main/java/com/google/android/react/navsdk/Constants.java

@@ -15,7 +15,6 @@
 
 public class Constants {
   public static final String NAV_JAVASCRIPT_FLAG = "NavJavascriptBridge";
-  public static final String NAV_VIEW_JAVASCRIPT_FLAG = "NavViewJavascriptBridge";
   public static final String LAT_FIELD_KEY = "lat";
   public static final String LNG_FIELD_KEY = "lng";
 }

android/src/main/java/com/google/android/react/navsdk/INavigationViewCallback.java

@@ -187,6 +187,7 @@ private void cleanup() {
     mWaypoints.clear();
 
     UiThreadUtil.runOnUiThread(() -> {
+      mNavigator.clearDestinations();
       mNavigator.cleanup();
     });
   }