Add Map.getOrDefault method as PlatformDependent declaration with refined signature

- First parameter should have type of K instead of Any
- Special bridge should return second parameter if a key has wrong type
- Special bridge may throw an exception if defaultValue has wrong type

 #KT-13209 Fixed

core/builtins/native/kotlin/Collections.kt

@@ -298,6 +298,17 @@ public interface Map<K, out V> {
      */
     public operator fun get(key: K): V?
 
+    /**
+     * Returns the value corresponding to the given [key], or [defaultValue] if such a key is not present in the map.
+     *
+     * @since JDK 1.8
+     */
+    @PlatformDependent
+    public fun getOrDefault(key: K, defaultValue: @UnsafeVariance V): V {
+        // See default implementation in JDK sources
+        return null as V
+    }
+
     // Views
     /**
      * Returns a [Set] of all keys in this map.