fix: GoogleAdsError missing using generator version after 1.3.0 (#1526)

[PR](googleapis/gapic-generator-typescript#878) within
updated gapic-generator-typescript version 1.4.0

Committer: @summer-ji-eng
PiperOrigin-RevId: 375759421

Source-Author: Google APIs <noreply@google.com>
Source-Date: Tue May 25 11:51:53 2021 -0700
Source-Repo: googleapis/googleapis
Source-Sha: 95fa72fdd0d69b02d72c33b37d1e4cc66d4b1446
Source-Link: googleapis/googleapis@95fa72f

dev/src/v1/firestore_admin_client.ts

@@ -143,6 +143,8 @@ export class FirestoreAdminClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);

dev/src/v1/firestore_client.ts

@@ -146,6 +146,8 @@ export class FirestoreClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);

dev/src/v1beta1/firestore_client.ts

@@ -149,6 +149,8 @@ export class FirestoreClient {
     }
     if (!opts.fallback) {
       clientHeader.push(`grpc/${this._gaxGrpc.grpcVersion}`);
+    } else if (opts.fallback === 'rest') {
+      clientHeader.push(`rest/${this._gaxGrpc.grpcVersion}`);
     }
     if (opts.libName && opts.libVersion) {
       clientHeader.push(`${opts.libName}/${opts.libVersion}`);

synth.metadata

@@ -4,15 +4,15 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-firestore.git",
-        "sha": "aa92a1545a64e1164d5454c24fb38fb99aa1fd24"
+        "sha": "c4096affaa69017ff1515d02631fd68614605528"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "6fa858c6489b1bbc505a7d7afe39f2dc45819c38",
-        "internalRef": "372656503"
+        "sha": "95fa72fdd0d69b02d72c33b37d1e4cc66d4b1446",
+        "internalRef": "375759421"
       }
     },
     {