Adding 'is' to list of kotlin reserved keywords (#116299)

Co-authored-by: Gray Mackall <mackall@google.com>

packages/flutter_tools/lib/src/template.dart

@@ -17,7 +17,7 @@ import 'dart/package_map.dart';
 /// They are escaped in Kotlin files.
 ///
 /// https://kotlinlang.org/docs/keyword-reference.html
-const List<String> kReservedKotlinKeywords = <String>['when', 'in'];
+const List<String> kReservedKotlinKeywords = <String>['when', 'in', 'is'];
 
 /// Expands templates in a directory to a destination. All files that must
 /// undergo template expansion should end with the '.tmpl' extension. All files

packages/flutter_tools/test/general.shard/android/template_test.dart

@@ -36,12 +36,12 @@ void main() {
     );
 
     final Map<String, Object> context = <String, Object>{
-      'androidIdentifier': 'in.when.there',
+      'androidIdentifier': 'is.in.when.there',
     };
     template.render(destination, context);
 
     final File destinationFile = destination.childFile(outputClass);
-    expect(destinationFile.readAsStringSync(), equals('package `in`.`when`.there;'));
+    expect(destinationFile.readAsStringSync(), equals('package `is`.`in`.`when`.there;'));
   });
 
 }