fix(tree): make toggle non-recursive by default (#10879)

Author: tinayuangao

src/cdk/tree/toggle.ts

@@ -27,7 +27,7 @@ export class CdkTreeNodeToggle<T> {
   @Input('cdkTreeNodeToggleRecursive')
   get recursive(): boolean { return this._recursive; }
   set recursive(value: boolean) { this._recursive = coerceBooleanProperty(value); }
-  protected _recursive = true;
+  protected _recursive = false;
 
   constructor(protected _tree: CdkTree<T>,
               protected _treeNode: CdkTreeNode<T>) {}

src/lib/tree/toggle.ts

@@ -20,5 +20,5 @@ import {CdkTreeNodeToggle} from '@angular/cdk/tree';
   providers: [{provide: CdkTreeNodeToggle, useExisting: MatTreeNodeToggle}]
 })
 export class MatTreeNodeToggle<T> extends CdkTreeNodeToggle<T> {
-  @Input('matTreeNodeToggleRecursive') recursive: boolean = true;
+  @Input('matTreeNodeToggleRecursive') recursive: boolean = false;
 }