ci: sample build in Cloud Build (#1606)

b/322966824

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:
- [ ] Make sure to open an issue as a [bug/issue](https://togithub.com/googleapis/java-pubsublite/issues/new/choose) before writing your code!  That way we can discuss the change, evaluate designs, and agree on the general idea
- [ ] Ensure the tests and linter pass
- [ ] Code coverage does not decrease (if any source code was changed)
- [ ] Appropriate docs were updated (if necessary)

Fixes #<issue_number_goes_here> ☕️

If you write sample code, please follow the [samples format](
https://togithub.com/GoogleCloudPlatform/java-docs-samples/blob/main/SAMPLE_FORMAT.md).

Author: suztomo

.cloudbuild/samples_build.yaml

@@ -0,0 +1,33 @@
+steps:
+- name: gcr.io/cloud-devrel-public-resources/java8
+  entrypoint: ls
+  args: [
+    '-alt',
+  ]
+- name: gcr.io/cloud-devrel-public-resources/java8
+  entrypoint: curl
+  args: [
+    '--header',
+    'Metadata-Flavor: Google',
+    'http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/email'
+  ]
+- name: gcr.io/cloud-devrel-public-resources/java8
+  entrypoint: pwd
+- name: gcr.io/cloud-devrel-public-resources/java8
+  entrypoint: bash
+  args: [
+    '.kokoro/build.sh'
+  ]
+  env:
+  - 'JOB_TYPE=samples'
+  - 'GOOGLE_CLOUD_PROJECT=cloud-java-ci-sample'
+  - 'GOOGLE_CLOUD_PROJECT_NUMBER=615621127317'
+- name: gcr.io/cloud-devrel-public-resources/java8
+  entrypoint: echo
+  args: [
+    'Sample job succeeded',
+  ]
+timeout: 3600s
+options:
+  defaultLogsBucketBehavior: REGIONAL_USER_OWNED_BUCKET
+

README.md

@@ -33,13 +33,13 @@ If you are using Maven, add this to your pom.xml file:
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-pubsublite:1.12.22'
+implementation 'com.google.cloud:google-cloud-pubsublite:1.13.0'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-pubsublite" % "1.12.22"
+libraryDependencies += "com.google.cloud" % "google-cloud-pubsublite" % "1.13.0"
 ```
 <!-- {x-version-update-end} -->
 
@@ -483,7 +483,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-pubsublite/java11.html
 [stability-image]: https://img.shields.io/badge/stability-stable-green
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-pubsublite.svg
-[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-pubsublite/1.12.22
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-pubsublite/1.13.0
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
 [auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
 [predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles