[NavigationRail] Update active indicator to use new shape system.

PiperOrigin-RevId: 445912992

Author: hunterstich

lib/java/com/google/android/material/navigationrail/res/values/styles.xml

@@ -85,7 +85,7 @@
     <item name="android:width">@dimen/m3_navigation_rail_item_active_indicator_width</item>
     <item name="android:height">@dimen/m3_navigation_rail_item_active_indicator_height</item>
     <item name="marginHorizontal">@dimen/m3_navigation_rail_item_active_indicator_margin_horizontal</item>
-    <item name="shapeAppearance">@style/ShapeAppearance.Material3.NavigationBarView.ActiveIndicator</item>
+    <item name="shapeAppearance">@style/ShapeAppearance.Material3.Corner.Full</item>
     <item name="android:color">?attr/colorSecondaryContainer</item>
   </style>