fix(angular): transition plays when using browser buttons (#28530)

Issue number: resolves #16569

---------

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## What is the current behavior?
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Ionic Angular's routing integration disables page transitions when using
the browser back/forward buttons.

## What is the new behavior?
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this PR. -->

- Transitions now play when using the back/forward buttons

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

We're not aware of any breaking changes here, though it's possible some
developers were relying on this behavior. As a result, we are targeting
Ionic 8 to minimize any potential negative impact this fix may have on
developers.

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and migration path for existing applications below. -->


## Other information

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screenshots of how the component looks before and after the change. -->

Supersedes https://github.com/ionic-team/ionic-framework/pull/28188

Dev build: `7.5.6-dev.11700068172.15ce9b35`

Co-authored-by: hoi4 <hoi4@users.noreply.github.com>

packages/angular/common/src/providers/nav-controller.ts

@@ -37,9 +37,9 @@ export class NavController {
     if (router) {
       router.events.subscribe((ev) => {
         if (ev instanceof NavigationStart) {
+          // restoredState is set if the browser back/forward button is used
           const id = ev.restoredState ? ev.restoredState.navigationId : ev.id;
-          this.guessDirection = id < this.lastNavId ? 'back' : 'forward';
-          this.guessAnimation = !ev.restoredState ? this.guessDirection : undefined;
+          this.guessDirection = this.guessAnimation = id < this.lastNavId ? 'back' : 'forward';
           this.lastNavId = this.guessDirection === 'forward' ? ev.id : id;
         }
       });