License update (#45373)

* Update project.pbxproj files to say Flutter rather than Chromium

Also, the templates now have an empty organization so that we don't cause people to give their apps a Flutter copyright.

* Update the copyright notice checker to require a standard notice on all files

* Update copyrights on Dart files. (This was a mechanical commit.)

* Fix weird license headers on Dart files that deviate from our conventions; relicense Shrine.

Some were already marked "The Flutter Authors", not clear why. Their
dates have been normalized. Some were missing the blank line after the
license. Some were randomly different in trivial ways for no apparent
reason (e.g. missing the trailing period).

* Clean up the copyrights in non-Dart files. (Manual edits.)

Also, make sure templates don't have copyrights.

* Fix some more ORGANIZATIONNAMEs
diff --git a/flutter_console.bat b/flutter_console.bat
index 9271d29..e88b8e7 100644
--- a/flutter_console.bat
+++ b/flutter_console.bat
@@ -1,23 +1,23 @@
-@echo off
-REM Copyright 2017 The Chromium Authors. All rights reserved.
+@ECHO off
+REM Copyright 2014 The Flutter Authors. All rights reserved.
 REM Use of this source code is governed by a BSD-style license that can be
 REM found in the LICENSE file.
 
 TITLE Flutter Console
 
 echo.
-echo          ######## ##       ##     ## ######## ######## ######## ########
-echo          ##       ##       ##     ##    ##       ##    ##       ##     ##
-echo          ##       ##       ##     ##    ##       ##    ##       ##     ##
-echo          ######   ##       ##     ##    ##       ##    ######   ########
-echo          ##       ##       ##     ##    ##       ##    ##       ##   ##
-echo          ##       ##       ##     ##    ##       ##    ##       ##    ##
-echo          ##       ########  #######     ##       ##    ######## ##     ##
+echo         ######## ##       ##     ## ######## ######## ######## ########
+echo         ##       ##       ##     ##    ##       ##    ##       ##     ##
+echo         ##       ##       ##     ##    ##       ##    ##       ##     ##
+echo         ######   ##       ##     ##    ##       ##    ######   ########
+echo         ##       ##       ##     ##    ##       ##    ##       ##   ##
+echo         ##       ##       ##     ##    ##       ##    ##       ##    ##
+echo         ##       ########  #######     ##       ##    ######## ##     ##
 echo.
 echo.
 
 echo  WELCOME to the Flutter Console.
-echo  ================================================================================
+echo  ===============================================================================
 echo.
 echo  Use the console below this message to interact with the "flutter" command.
 echo  Run "flutter doctor" to check if your system is ready to run Flutter apps.
@@ -30,7 +30,7 @@
 echo  Want to run the "flutter" command from any Command Prompt or PowerShell window?
 echo  Add Flutter to your PATH: https://flutter.dev/setup-windows/#update-your-path
 echo.
-echo  ================================================================================
+echo  ===============================================================================
 
 REM "%~dp0" is the directory of this file including trailing backslash
 SET PATH=%~dp0bin;%PATH%