chore(lint): Added license headers to most TypeScript files

Relates to #9380

modules/@angular/compiler/src/animation/animation_ast.ts

@@ -1,3 +1,11 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
 export abstract class AnimationAst {
   public startTime: number = 0;
   public playTime: number = 0;

modules/@angular/compiler/src/animation/animation_compiler.ts

@@ -1,3 +1,11 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
 import {AUTO_STYLE} from '@angular/core';
 
 import {ANY_STATE, DEFAULT_STATE, EMPTY_STATE} from '../../core_private';

modules/@angular/compiler/src/animation/animation_parser.ts

@@ -1,3 +1,11 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
 import {ANY_STATE, FILL_STYLE_FLAG} from '../../core_private';
 import {CompileAnimationAnimateMetadata, CompileAnimationEntryMetadata, CompileAnimationGroupMetadata, CompileAnimationKeyframesSequenceMetadata, CompileAnimationMetadata, CompileAnimationSequenceMetadata, CompileAnimationStateDeclarationMetadata, CompileAnimationStateTransitionMetadata, CompileAnimationStyleMetadata, CompileAnimationWithStepsMetadata} from '../compile_metadata';
 import {ListWrapper, StringMapWrapper} from '../facade/collection';

modules/@angular/compiler/src/animation/styles_collection.ts

@@ -1,3 +1,11 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
 import {ListWrapper} from '../facade/collection';
 import {isPresent} from '../facade/lang';