refactor: remove usage of private buildDefaultPath method from @schematics/angular (#19229)

The internal `project` file will be deleted with this change angular/angular-cli#17597, this copies that implementation to the file were it's needed.

Author: alan-agius4

src/cdk/schematics/utils/build-component.ts

@@ -27,8 +27,8 @@ import {InsertChange} from '@schematics/angular/utility/change';
 import {getWorkspace} from '@schematics/angular/utility/config';
 import {buildRelativePath, findModuleFromOptions} from '@schematics/angular/utility/find-module';
 import {parseName} from '@schematics/angular/utility/parse-name';
-import {buildDefaultPath} from '@schematics/angular/utility/project';
 import {validateHtmlSelector, validateName} from '@schematics/angular/utility/validation';
+import {ProjectType, WorkspaceProject} from '@schematics/angular/utility/workspace-models';
 import {readFileSync, statSync} from 'fs';
 import {dirname, join, resolve} from 'path';
 import * as ts from 'typescript';
@@ -40,6 +40,20 @@ import {
 import {getProjectFromWorkspace} from './get-project';
 import {getDefaultComponentOptions} from './schematic-options';
 
+/**
+ * Build a default project path for generating.
+ * @param project The project to build the path for.
+ */
+function buildDefaultPath(project: WorkspaceProject): string {
+  const root = project.sourceRoot
+    ? `/${project.sourceRoot}/`
+    : `/${project.root}/src/`;
+
+  const projectDirName = project.projectType === ProjectType.Application ? 'app' : 'lib';
+
+  return `${root}${projectDirName}`;
+}
+
 /**
  * List of style extensions which are CSS compatible. All supported CLI style extensions can be
  * found here: angular/angular-cli/master/packages/schematics/angular/ng-new/schema.json#L118-L122