[NavigationDrawer] adds padding property in NavigationDrawer Widget (#123961)

Adds `tilePadding` property to `NavigationDrawer` Widget.

Fixes: #121662

| Without adding `tilePadding` in NavigationDrawer | With `tilePadding: EdgeInsets.all(16)` in NavigationDrawer |
| --- | --- |
| ![photo_2023-04-02_15-03-56](https://user-images.githubusercontent.com/13456345/229344718-9070c0c0-9c71-4436-9953-d258367951e9.jpg) | ![photo_2023-04-02_15-04-00](https://user-images.githubusercontent.com/13456345/229344717-0768f9d5-6a55-4c2f-918e-53f2423bb959.jpg) |

packages/flutter/lib/src/material/navigation_drawer.dart

@@ -61,6 +61,7 @@ class NavigationDrawer extends StatelessWidget {
     this.indicatorShape,
     this.onDestinationSelected,
     this.selectedIndex = 0,
+    this.tilePadding = const EdgeInsets.symmetric(horizontal: 12.0),
   });
 
   /// The background color of the [Material] that holds the [NavigationDrawer]'s
@@ -124,6 +125,11 @@ class NavigationDrawer extends StatelessWidget {
   /// Upon updating [selectedIndex], the [NavigationDrawer] will be rebuilt.
   final ValueChanged<int>? onDestinationSelected;
 
+  /// Defines the padding for [NavigationDrawerDestination] widgets (Drawer items).
+  ///
+  /// Defaults to `EdgeInsets.symmetric(horizontal: 12.0)`.
+  final EdgeInsetsGeometry tilePadding;
+
   @override
   Widget build(BuildContext context) {
     final int totalNumberOfDestinations =
@@ -141,6 +147,7 @@ class NavigationDrawer extends StatelessWidget {
             selectedAnimation: animation,
             indicatorColor: indicatorColor,
             indicatorShape: indicatorShape,
+            tilePadding: tilePadding,
             onTap: () {
               if (onDestinationSelected != null) {
                 onDestinationSelected!(index);
@@ -321,7 +328,7 @@ class _NavigationDestinationBuilder extends StatelessWidget {
     final NavigationDrawerThemeData defaults = _NavigationDrawerDefaultsM3(context);
 
     return Padding(
-      padding: const EdgeInsets.symmetric(horizontal: 12.0),
+      padding: info.tilePadding,
       child: _NavigationDestinationSemantics(
         child: SizedBox(
           height: navigationDrawerTheme.tileHeight ?? defaults.tileHeight,
@@ -455,6 +462,7 @@ class _NavigationDrawerDestinationInfo extends InheritedWidget {
     required this.indicatorShape,
     required this.onTap,
     required super.child,
+    required this.tilePadding,
   });
 
   /// Which destination index is this in the navigation drawer.
@@ -514,6 +522,11 @@ class _NavigationDrawerDestinationInfo extends InheritedWidget {
   /// with [index] passed in.
   final VoidCallback onTap;
 
+  /// Defines the padding for [NavigationDrawerDestination] widgets (Drawer items).
+  ///
+  /// Defaults to `EdgeInsets.symmetric(horizontal: 12.0)`.
+  final EdgeInsetsGeometry tilePadding;
+
   /// Returns a non null [_NavigationDrawerDestinationInfo].
   ///
   /// This will return an error if called with no [_NavigationDrawerDestinationInfo]

packages/flutter/test/material/navigation_drawer_test.dart

@@ -360,6 +360,29 @@ void main() {
     // Test that InkWell for hover, focus and pressed use custom shape.
     expect(_getInkWell(tester)?.customBorder, shape);
   });
+
+  testWidgets('NavigationDrawer.tilePadding defaults to EdgeInsets.symmetric(horizontal: 12.0)', (WidgetTester tester) async {
+    final GlobalKey<ScaffoldState> scaffoldKey = GlobalKey<ScaffoldState>();
+    widgetSetup(tester, 3000, viewHeight: 3000);
+    final Widget widget = _buildWidget(
+      scaffoldKey,
+      NavigationDrawer(
+        children: const <Widget>[
+          NavigationDrawerDestination(
+            icon: Icon(Icons.ac_unit),
+            label: Text('AC'),
+          ),
+        ],
+        onDestinationSelected: (int i) {},
+      ),
+    );
+
+    await tester.pumpWidget(widget);
+    scaffoldKey.currentState?.openDrawer();
+    await tester.pump();
+    final NavigationDrawer drawer = tester.widget(find.byType(NavigationDrawer));
+    expect(drawer.tilePadding, const EdgeInsets.symmetric(horizontal: 12.0));
+  });
 }
 
 Widget _buildWidget(GlobalKey<ScaffoldState> scaffoldKey, Widget child) {