style(docs-infra): fix docs examples for tslint rule import-spacing (#38143)

This commit updates the docs examples to be compatible with the
`import-spacing` tslint rule.

This is in preparation of updating the docs examples `tslint.json` to
match the one generated for new Angular CLI apps in a future commit.

PR Close #38143

aio/content/examples/lifecycle-hooks/src/app/after-content.component.ts

@@ -2,7 +2,7 @@
 // #docregion
 import { AfterContentChecked, AfterContentInit, Component, ContentChild } from '@angular/core';
 
-import { LoggerService }  from './logger.service';
+import { LoggerService } from './logger.service';
 
 //////////////////
 @Component({

aio/content/examples/lifecycle-hooks/src/app/after-view.component.ts

@@ -2,7 +2,7 @@
 // #docregion
 import { AfterViewChecked, AfterViewInit, Component, ViewChild } from '@angular/core';
 
-import { LoggerService }  from './logger.service';
+import { LoggerService } from './logger.service';
 
 //////////////////
 // #docregion child-view

aio/content/examples/lifecycle-hooks/src/app/counter.component.ts

@@ -4,7 +4,7 @@ import {
   OnChanges, SimpleChanges,
 } from '@angular/core';
 
-import { LoggerService }  from './logger.service';
+import { LoggerService } from './logger.service';
 
 @Component({
   selector: 'app-counter',

aio/content/examples/lifecycle-hooks/src/app/peek-a-boo.component.ts

@@ -11,7 +11,7 @@ import {
   SimpleChanges
 } from '@angular/core';
 import { Component, Input } from '@angular/core';
-import { LoggerService }    from './logger.service';
+import { LoggerService } from './logger.service';
 
 let nextId = 1;
 

aio/content/examples/lifecycle-hooks/src/app/spy.component.ts

@@ -1,7 +1,7 @@
 // #docregion
 import { Component } from '@angular/core';
 
-import { LoggerService }  from './logger.service';
+import { LoggerService } from './logger.service';
 
 @Component({
   selector: 'spy-parent',