refactor: Minor code style and readability improvements

This commit includes minor code cleanup across several files:
- Removes extra newlines in `GeoJson*`, and `Layer` classes.
- Fixes indentation in `PolyUtil`.
- Improves readability in `SphericalUtil.computeSignedArea`

Author: dkhawk

library/src/main/java/com/google/maps/android/PolyUtil.kt

@@ -301,7 +301,7 @@ object PolyUtil {
      * simplified poly.
      * @return a simplified poly produced by the Douglas-Peucker algorithm
      */
-        @JvmStatic
+    @JvmStatic
     fun simplify(poly: Polyline, tolerance: Double): Polyline {
         require(poly.isNotEmpty()) { "Polyline must have at least 1 point" }
         require(tolerance > 0) { "Tolerance must be greater than zero" }

library/src/main/java/com/google/maps/android/SphericalUtil.kt

@@ -240,7 +240,6 @@ object SphericalUtil {
     @JvmStatic
     fun computeSignedArea(path: Polygon) = computeSignedArea(path, EARTH_RADIUS)
 
-
     /**
      * Returns the signed area of a closed path on a sphere of given radius.
      * The computed area uses the same units as the radius squared.
@@ -261,9 +260,12 @@ object SphericalUtil {
             return polarTriangleArea(tanLat1, lng2, tanLat2, lng1)
         }
 
+        // Create a sequence of edges, including the final edge that closes the polygon.
+        // Using a sequence avoids creating an intermediate list.
+        val edges = path.asSequence().zipWithNext() + (path.last() to path.first())
+
         // Use a sequence to avoid creating intermediate lists
-        val totalArea = (path.asSequence().zipWithNext() + (path.last() to path.first()))
-            .sumOf { (p1, p2) -> polarArea(p1, p2) }
+        val totalArea = edges.sumOf { (p1, p2) -> polarArea(p1, p2) }
 
         return totalArea * (radius * radius)
     }

library/src/main/java/com/google/maps/android/data/Layer.kt

@@ -103,7 +103,6 @@ abstract class Layer<T : Feature> {
         return renderer?.features ?: emptyList()
     }
 
-
     /**
      * Retrieves a corresponding Feature instance for the given Object
      * Allows maps with multiple layers to determine which layer the Object
@@ -145,7 +144,6 @@ abstract class Layer<T : Feature> {
         return (renderer as? KmlRenderer)?.nestedContainers
     }
 
-
     /**
      * Gets an iterable of KmlGroundOverlay objects
      *

library/src/main/java/com/google/maps/android/data/geojson/GeoJsonGeometryCollection.java

@@ -38,8 +38,6 @@ public String getGeometryType() {
         return "GeometryCollection";
     }
 
-    
-
     /**
      * Gets the stored Geometry objects
      *

library/src/main/java/com/google/maps/android/data/geojson/GeoJsonMultiLineString.java

@@ -39,8 +39,6 @@ public String getGeometryType() {
         return "MultiLineString";
     }
 
-    
-
     /**
      * Gets a list of GeoJsonLineStrings
      *

library/src/main/java/com/google/maps/android/data/geojson/GeoJsonMultiPoint.java

@@ -39,8 +39,6 @@ public String getGeometryType() {
         return "MultiPoint";
     }
 
-    
-
     /**
      * Gets a list of GeoJsonPoints
      *

library/src/main/java/com/google/maps/android/data/geojson/GeoJsonMultiPolygon.java

@@ -40,8 +40,6 @@ public String getGeometryType() {
         return "MultiPolygon";
     }
 
-    
-
     /**
      * Gets a list of GeoJsonPolygons
      *