material docImports (#152060)

flutter/flutter#150800. I skipped files that contain generated code because the script isn't smart enough, and I did not fix some dubious comment refs. Those will be addressed in a different PR.

Author: LongCatIsLooong

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

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+/// @docImport 'drawer.dart';
+/// @docImport 'list_tile_theme.dart';
+library;
+
 import 'dart:developer' show Flow, Timeline;
 import 'dart:io' show Platform;
 

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

@@ -2,6 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+/// @docImport 'package:flutter/services.dart';
+///
+/// @docImport 'app_bar.dart';
+/// @docImport 'drawer.dart';
+/// @docImport 'material.dart';
+library;
+
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 

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

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+/// @docImport 'selectable_text.dart';
+/// @docImport 'selection_area.dart';
+/// @docImport 'text_field.dart';
+library;
+
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/rendering.dart';
 

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

@@ -2,6 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+/// @docImport 'app_bar.dart';
+/// @docImport 'color_scheme.dart';
+/// @docImport 'dialog.dart';
+/// @docImport 'drawer.dart';
+/// @docImport 'material.dart';
+/// @docImport 'popup_menu.dart';
+/// @docImport 'scaffold.dart';
+library;
+
 import 'dart:ui' as ui;
 
 import 'package:flutter/cupertino.dart';

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

@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+/// @docImport 'app_bar.dart';
+library;
+
 import 'dart:ui' show lerpDouble;
 
 import 'package:flutter/foundation.dart';

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

@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+/// @docImport 'package:flutter/widgets.dart';
+library;
+
 import 'dart:math' as math;
 import 'dart:ui' show lerpDouble;
 

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

@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+/// @docImport 'badge.dart';
+library;
+
 import 'dart:ui' show lerpDouble;
 
 import 'package:flutter/foundation.dart';

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

@@ -2,6 +2,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+/// @docImport 'banner.dart';
+library;
+
 import 'dart:ui' show lerpDouble;
 
 import 'package:flutter/foundation.dart';

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

@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+/// @docImport 'bottom_app_bar.dart';
+/// @docImport 'material.dart';
+library;
+
 import 'dart:ui' show lerpDouble;
 
 import 'package:flutter/foundation.dart';

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

@@ -2,6 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+/// @docImport 'color_scheme.dart';
+/// @docImport 'navigation_bar.dart';
+/// @docImport 'scaffold.dart';
+library;
+
 import 'dart:collection' show Queue;
 import 'dart:math' as math;