NAVAND-5162: Decouple core-mapgpt from map-gpt-api (#9352)

GitOrigin-RevId: 69133a87aac3decf0c827ab42940f1a87c17ea1f

Author: dmitry-novikov

base/api/current.txt

@@ -362,6 +362,10 @@ package com.mapbox.navigation.base.middleware {
   @com.mapbox.navigation.base.ExperimentalPreviewMapboxNavigationAPI public interface MiddlewareContext {
   }
 
+  @com.mapbox.navigation.base.ExperimentalPreviewMapboxNavigationAPI public static final class MiddlewareContext.Empty implements com.mapbox.navigation.base.middleware.MiddlewareContext {
+    field public static final com.mapbox.navigation.base.middleware.MiddlewareContext.Empty INSTANCE;
+  }
+
   @com.mapbox.navigation.base.ExperimentalPreviewMapboxNavigationAPI public fun interface MiddlewareContextFactory<Input extends com.mapbox.navigation.base.middleware.MiddlewareContext, Output extends com.mapbox.navigation.base.middleware.MiddlewareContext> {
     method public Output build(Input);
   }

base/src/main/java/com/mapbox/navigation/base/middleware/MiddlewareContext.kt

@@ -7,4 +7,10 @@ import com.mapbox.navigation.base.ExperimentalPreviewMapboxNavigationAPI
  * required by various middleware components.
  */
 @ExperimentalPreviewMapboxNavigationAPI
-interface MiddlewareContext
+interface MiddlewareContext {
+
+    @ExperimentalPreviewMapboxNavigationAPI
+    object Empty : MiddlewareContext {
+        override fun toString(): String = "MiddlewareContext.Empty"
+    }
+}