deps: update dependency com.google.auth:google-auth-library-oauth2-ht…

…tp to v1.9.0 (#400)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.auth:google-auth-library-oauth2-http](https://togithub.com/googleapis/google-auth-library-java) | `1.8.1` -> `1.9.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.9.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.9.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.9.0/compatibility-slim/1.8.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.auth:google-auth-library-oauth2-http/1.9.0/confidence-slim/1.8.1)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/google-auth-library-java</summary>

### [`v1.9.0`](https://togithub.com/googleapis/google-auth-library-java/blob/HEAD/CHANGELOG.md#&#8203;190-httpsgithubcomgoogleapisgoogle-auth-library-javacomparev181v190-2022-08-02)

[Compare Source](https://togithub.com/googleapis/google-auth-library-java/compare/v1.8.1...v1.9.0)

##### Features

-   integration tests for pluggable auth ([#&#8203;939](https://togithub.com/googleapis/google-auth-library-java/issues/939)) ([22f37aa](https://togithub.com/googleapis/google-auth-library-java/commit/22f37aa687b7ffb4209a131860ccdd02f6fc4d42))

##### Bug Fixes

-   expiration time of the ImpersonatedCredentials token depending on the current host's timezone ([#&#8203;932](https://togithub.com/googleapis/google-auth-library-java/issues/932)) ([73af08a](https://togithub.com/googleapis/google-auth-library-java/commit/73af08a1c5f14e18936e9dbd3d1ba29c2675961d))

##### Documentation

-   update wif documentation with enable-imdsv2 flag ([#&#8203;940](https://togithub.com/googleapis/google-auth-library-java/issues/940)) ([acc1ce3](https://togithub.com/googleapis/google-auth-library-java/commit/acc1ce3603435f1c0cf23b8606af71b05e566f2f))

</details>

---

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java-iam/samples/cloud-client/snippets/pom.xml

@@ -31,7 +31,7 @@
     <dependency>
       <groupId>com.google.auth</groupId>
       <artifactId>google-auth-library-oauth2-http</artifactId>
-      <version>1.8.1</version>
+      <version>1.9.0</version>
     </dependency>
     <dependency>
       <groupId>com.google.http-client</groupId>