docs: add ExternalDriver docstrings (#17985)

packages/base-driver/lib/protocol/routes.js

@@ -135,7 +135,7 @@ const METHOD_MAP = /** @type {const} */ ({
     POST: {command: 'setFrame', payloadParams: {required: ['id']}},
   },
   '/session/:sessionId/frame/parent': {
-    POST: {},
+    POST: {command: 'switchToParentFrame'},
   },
   '/session/:sessionId/window': {
     GET: {command: 'getWindowHandle'},

packages/base-driver/test/unit/protocol/routes.spec.js

@@ -35,7 +35,7 @@ describe('Protocol', function () {
       }
       let hash = shasum.digest('hex').substring(0, 8);
       // Modify the hash whenever the protocol has intentionally been modified.
-      hash.should.equal('43ef41a2');
+      hash.should.equal('b1985791');
     });
   });