Update template comments (#23665)

* Update template comments

Make template comments consistent with recent tools changes

* Update packages/flutter_tools/templates/app/lib/main.dart.tmpl
Co-Authored-By: mit-mit <mit-mit@users.noreply.github.com>

* Fix merge conflict

packages/flutter_tools/templates/app/lib/main.dart.tmpl

@@ -35,8 +35,9 @@ class MyApp extends StatelessWidget {
         // application has a blue toolbar. Then, without quitting the app, try
         // changing the primarySwatch below to Colors.green and then invoke
         // "hot reload" (press "r" in the console where you ran "flutter run",
-        // or press Run > Flutter Hot Reload in IntelliJ). Notice that the
-        // counter didn't reset back to zero; the application is not restarted.
+        // or simply save your changes to "hot reload" in a Flutter IDE).
+        // Notice that the counter didn't reset back to zero; the application
+        // is not restarted.
         primarySwatch: Colors.blue,
       ),
       home: MyHomePage(title: 'Flutter Demo Home Page'),
@@ -98,9 +99,9 @@ class _MyHomePageState extends State<MyHomePage> {
           // arranges them vertically. By default, it sizes itself to fit its
           // children horizontally, and tries to be as tall as its parent.
           //
-          // Invoke "debug paint" (press "p" in the console where you ran
-          // "flutter run", or select "Toggle Debug Paint" from the Flutter tool
-          // window in IntelliJ) to see the wireframe for each widget.
+          // Invoke "debug painting" (press "p" in the console or choose the
+          // "Toggle Debug Paint" command in Android Studio or Visual Studio Code)
+          // to see the wireframe for each widget.
           //
           // Column has various properties to control how it sizes itself and
           // how it positions its children. Here we use mainAxisAlignment to