refactor(@angular/pwa): fix dependencies and import paths for strict deps requirements

Author: josephperrott

packages/angular/pwa/BUILD.bazel

@@ -50,13 +50,11 @@ ts_project(
     name = "pwa_test_lib",
     testonly = True,
     srcs = glob(["pwa/**/*_spec.ts"]),
-    # TODO: Fix strict_deps failure
-    ignore_strict_deps = True,
     deps = [
+        ":node_modules/@angular-devkit/schematics",
         ":pwa_rjs",
         "//:node_modules/@types/jasmine",
         "//:node_modules/@types/node",
-        "//packages/angular_devkit/schematics/testing:testing_rjs",
     ],
 )