docs(datetime): fix angular demos where ViewEncapsulation needs to be off

Author: brandyscarney

static/usage/v7/datetime/styling/calendar-days/angular/example_component_ts.md

@@ -1,10 +1,14 @@
 ```ts
-import { Component, OnInit, ViewChild } from '@angular/core';
+import { Component, OnInit, ViewEncapsulation } from '@angular/core';
 
+// ViewEncapsulation is turned off for this demo due to
+// a lack of support for styling multiple css shadow parts
+// See https://github.com/angular/angular/issues/22515
 @Component({
   selector: 'app-example',
   templateUrl: 'example.component.html',
   styleUrls: ['example.component.css'],
+  encapsulation: ViewEncapsulation.None
 })
 export class ExampleComponent implements OnInit {
   public datetime;

static/usage/v7/datetime/styling/wheel-styling/angular/example_component_ts.md

@@ -0,0 +1,14 @@
+```ts
+import { Component, ViewEncapsulation } from '@angular/core';
+
+// ViewEncapsulation is turned off for this demo due to
+// a lack of support for styling multiple css shadow parts
+// See https://github.com/angular/angular/issues/22515
+@Component({
+  selector: 'app-example',
+  templateUrl: 'example.component.html',
+  styleUrls: ['example.component.css'],
+  encapsulation: ViewEncapsulation.None
+})
+export class ExampleComponent { }
+```

static/usage/v7/datetime/styling/wheel-styling/index.md

@@ -9,6 +9,7 @@ import vue from './vue.md';
 
 import angular_example_component_html from './angular/example_component_html.md';
 import angular_example_component_css from './angular/example_component_css.md';
+import angular_example_component_ts from './angular/example_component_ts.md';
 
 <Playground
   version="7"
@@ -25,6 +26,7 @@ import angular_example_component_css from './angular/example_component_css.md';
       files: {
         'src/app/example.component.html': angular_example_component_html,
         'src/app/example.component.css': angular_example_component_css,
+        'src/app/example.component.ts': angular_example_component_ts,
       },
     },
   }}