refactor(material/autocomplete): Injects Breakpoint to fix breaking t…

…ests

Fixes broken presubmit tests for Angular Component's Autocomplete
constructor by injecting BreakpointObserver rather than adding to the
constructor.

Fixes b/247881646

src/material/autocomplete/autocomplete-trigger.ts

@@ -240,7 +240,6 @@ export class MatAutocompleteTrigger
     private _viewContainerRef: ViewContainerRef,
     private _zone: NgZone,
     private _changeDetectorRef: ChangeDetectorRef,
-    private _breakpointObserver: BreakpointObserver,
     @Inject(MAT_AUTOCOMPLETE_SCROLL_STRATEGY) scrollStrategy: any,
     @Optional() private _dir: Directionality | null,
     @Optional() @Inject(MAT_FORM_FIELD) @Host() private _formField: MatFormField | null,
@@ -881,6 +880,9 @@ export class MatAutocompleteTrigger
     });
   }
 
+  /** Implements BreakpointObserver to be used to detect handset landscape */
+  private _breakpointObserver = inject(BreakpointObserver);
+
   private _getOverlayPosition(): PositionStrategy {
     // Set default Overlay Position
     const strategy = this._overlay