fix(expansion): disable all animations when using NoopAnimationsModule

Disables all of the expansion panel animations if it's inside a module with the `NoopAnimationsModule`. Also removes the `mat-elevation-transition` from the expansion panel, because it hasn't been doing anything for a while since it gets overwritten by the `margin` transition below.

Relates to #10590.

Author: crisbeto

src/lib/expansion/expansion-panel.scss

@@ -1,12 +1,12 @@
 @import '../core/style/variables';
 @import '../core/style/elevation';
+@import '../core/style/noop-animation';
 @import '../../cdk/a11y/a11y';
 
 .mat-expansion-panel {
   $border-radius: 4px;
 
-  @include mat-elevation-transition;
-  @include mat-overridable-elevation(2);
+  @include _noop-animation();
   box-sizing: content-box;
   display: block;
   margin: 0;

src/lib/expansion/expansion-panel.ts

@@ -38,6 +38,7 @@ import {filter, startWith, take} from 'rxjs/operators';
 import {MatAccordion} from './accordion';
 import {matExpansionAnimations} from './expansion-animations';
 import {MatExpansionPanelContent} from './expansion-panel-content';
+import {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';
 
 // TODO(devversion): workaround for https://github.com/angular/material2/issues/12760
 export const _CdkAccordionItem = CdkAccordionItem;
@@ -74,6 +75,7 @@ let uniqueId = 0;
     'class': 'mat-expansion-panel',
     '[class.mat-expanded]': 'expanded',
     '[class.mat-expansion-panel-spacing]': '_hasSpacing()',
+    '[class._mat-animation-noopable]': `_animationMode === 'NoopAnimations'`,
   }
 })
 export class MatExpansionPanel extends CdkAccordionItem implements AfterContentInit, OnChanges,
@@ -121,7 +123,8 @@ export class MatExpansionPanel extends CdkAccordionItem implements AfterContentI
               _changeDetectorRef: ChangeDetectorRef,
               _uniqueSelectionDispatcher: UniqueSelectionDispatcher,
               private _viewContainerRef: ViewContainerRef,
-              @Inject(DOCUMENT) _document?: any) {
+              @Inject(DOCUMENT) _document?: any,
+              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string) {
     super(accordion, _changeDetectorRef, _uniqueSelectionDispatcher);
     this.accordion = accordion;
     this._document = _document;