Merge navigation ktx and main library colliding files

Relnote: "Move several navigation extension functions from the ktx
modules into the main libraries"
Bug: 184292145
Test: building docs with gradle 7.0 does not warn about duplicate
      navigation files

Change-Id: I4d1436efc57697f431adf6885539b2f703a9a19e

diff --git a/navigation/navigation-common/api/restricted_current.txt b/navigation/navigation-common/api/restricted_current.txt
index 86285171..57a02d1 100644
--- a/navigation/navigation-common/api/restricted_current.txt
+++ b/navigation/navigation-common/api/restricted_current.txt

@@ -156,6 +156,14 @@
     property @IdRes public final int startDestination;
   }
 
+  public final class NavGraphKt {
+    method public static operator boolean contains(androidx.navigation.NavGraph, @IdRes int id);
+    method public static inline operator androidx.navigation.NavDestination get(androidx.navigation.NavGraph, @IdRes int id);
+    method public static inline operator void minusAssign(androidx.navigation.NavGraph, androidx.navigation.NavDestination node);
+    method public static inline operator void plusAssign(androidx.navigation.NavGraph, androidx.navigation.NavDestination node);
+    method public static inline operator void plusAssign(androidx.navigation.NavGraph, androidx.navigation.NavGraph other);
+  }
+
   @androidx.navigation.Navigator.Name("navigation") public class NavGraphNavigator extends androidx.navigation.Navigator<androidx.navigation.NavGraph> {
     ctor public NavGraphNavigator(androidx.navigation.NavigatorProvider navigatorProvider);
     method public androidx.navigation.NavGraph createDestination();
@@ -282,5 +290,12 @@
     method @CallSuper public <T extends androidx.navigation.Navigator<?>> T getNavigator(String name);
   }
 
+  public final class NavigatorProviderKt {
+    method public static inline operator <T extends androidx.navigation.Navigator<? extends androidx.navigation.NavDestination>> T get(androidx.navigation.NavigatorProvider, String name);
+    method public static inline operator <T extends androidx.navigation.Navigator<? extends androidx.navigation.NavDestination>> T get(androidx.navigation.NavigatorProvider, kotlin.reflect.KClass<T> clazz);
+    method public static inline operator void plusAssign(androidx.navigation.NavigatorProvider, androidx.navigation.Navigator<? extends androidx.navigation.NavDestination> navigator);
+    method public static inline operator androidx.navigation.Navigator<? extends androidx.navigation.NavDestination>? set(androidx.navigation.NavigatorProvider, String name, androidx.navigation.Navigator<? extends androidx.navigation.NavDestination> navigator);
+  }
+
 }