ci: sample build in Cloud Build

[suztomo]

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 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.

[suztomo]

It failed:

Step #3: [INFO] Running pubsublite.QuickStartIT
Step #3: [ERROR] Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.155 s <<< FAILURE! - in pubsublite.QuickStartIT
Step #3: [ERROR] pubsublite.QuickStartIT  Time elapsed: 0.128 s  <<< ERROR!
Step #3: java.lang.ExceptionInInitializerError
Step #3: 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Step #3: 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
Step #3: 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Step #3: 	at java.lang.reflect.Method.invoke(Method.java:498)
Step #3: 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
Step #3: 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
Step #3: 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
Step #3: 	at org.junit.internal.runners.statements.RunBefores.invokeMethod(RunBefores.java:33)
Step #3: 	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
Step #3: 	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
Step #3: 	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
Step #3: 	at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:364)
Step #3: 	at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:272)
Step #3: 	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:237)
Step #3: 	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:158)
Step #3: 	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:428)
Step #3: 	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:162)
Step #3: 	at org.apache.maven.surefire.booter.ForkedBooter.run(ForkedBooter.java:562)
Step #3: 	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:548)
Step #3: Caused by: java.lang.NumberFormatException: null
Step #3: 	at java.lang.Long.parseLong(Long.java:552)
Step #3: 	at java.lang.Long.parseLong(Long.java:631)
Step #3: 	at pubsublite.QuickStartIT.<clinit>(QuickStartIT.java:49)
Step #3: 	... 19 more

[suztomo]

Step #3: Caused by: io.grpc.StatusRuntimeException: PERMISSION_DENIED: Pub/Sub Lite API has not been used in project 615621127317 before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/pubsublite.googleapis.com/overview?project=615621127317 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry.
Step #3: 	at io.grpc.Status.asRuntimeException(Status.java:533)