feat(google-maps): Add map-info-window component

Fix lint errors for features missing in the info window component. Add
comment to style to explain its function.

Author: mbehrlich

src/google-maps/map-info-window/assets/map-info-window.scss

@@ -1,3 +1,5 @@
+// Style to prevent info window content from displaying in the DOM, but instead
+// keeps it in the map.
 .map-info-window-container {
   .map-info-window-content {
     display: none;

src/google-maps/map-info-window/map-info-window.ts

@@ -1,12 +1,22 @@
+/**
+ * @license
+ * Copyright Google LLC 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 {
+  ChangeDetectionStrategy,
   Component,
   ElementRef,
   EventEmitter,
   Input,
   OnDestroy,
   OnInit,
   Output,
-  ViewChild
+  ViewChild,
+  ViewEncapsulation,
 } from '@angular/core';
 import {BehaviorSubject, combineLatest, Observable, ReplaySubject, Subject} from 'rxjs';
 import {map, takeUntil} from 'rxjs/operators';
@@ -19,13 +29,16 @@ import {MapMarker} from '../map-marker/index';
  * @see developers.google.com/maps/documentation/javascript/reference/info-window
  */
 @Component({
+  moduleId: module.id,
   selector: 'map-info-window',
   template: `<div class="map-info-window-container">
                <div #infoWindowContent class="map-info-window-content">
                  <ng-content></ng-content>
                </div>
              </div>`,
   styleUrls: ['./assets/map-info-window.css'],
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  encapsulation: ViewEncapsulation.None,
 })
 export class MapInfoWindow implements OnInit, OnDestroy {
   @Input()