* Add tracing

* Fixes

* tracing

* Add tracing sample

* Revert Quickstart

* Revert Spanner sample

* Address review comments

* Fix style violations

…v6.31.2 (googleapis#1002)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-spanner-bom](https://togithub.com/googleapis/java-spanner) | `6.31.0` -> `6.31.2` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-bom/6.31.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-bom/6.31.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-bom/6.31.2/compatibility-slim/6.31.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-spanner-bom/6.31.2/confidence-slim/6.31.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/java-spanner</summary>

### [`v6.31.2`](https://togithub.com/googleapis/java-spanner/blob/HEAD/CHANGELOG.md#&#8203;6312-httpsgithubcomgoogleapisjava-spannercomparev6311v6312-2022-10-05)

[Compare Source](https://togithub.com/googleapis/java-spanner/compare/v6.31.1...v6.31.2)

##### Bug Fixes

-   update protobuf to v3.21.7 ([ac71008](https://togithub.com/googleapis/java-spanner/commit/ac71008bf8b1244cb3c5cf4317a0d25d4ffc5bbd))

### [`v6.31.1`](https://togithub.com/googleapis/java-spanner/blob/HEAD/CHANGELOG.md#&#8203;6311-httpsgithubcomgoogleapisjava-spannercomparev6310v6311-2022-10-03)

[Compare Source](https://togithub.com/googleapis/java-spanner/compare/v6.31.0...v6.31.1)

##### Dependencies

-   Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.0.4 ([#&#8203;2090](https://togithub.com/googleapis/java-spanner/issues/2090)) ([8f46938](https://togithub.com/googleapis/java-spanner/commit/8f46938b67e44a7b739dc156dc8a0a89bcb33ef0))
-   Update dependency org.graalvm.buildtools:native-maven-plugin to v0.9.14 ([#&#8203;2031](https://togithub.com/googleapis/java-spanner/issues/2031)) ([c5e9ba1](https://togithub.com/googleapis/java-spanner/commit/c5e9ba1c1a47faf89c47a9146a97cb6711dce242))

</details>

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---


## [2.7.9](https://togithub.com/googleapis/java-spanner-jdbc/compare/v2.7.8...v2.7.9) (2022-10-06)


### Dependencies

* Update dependency com.google.cloud:google-cloud-spanner-bom to v6.31.2 ([googleapis#1002](https://togithub.com/googleapis/java-spanner-jdbc/issues/1002)) ([f2ac8e3](https://togithub.com/googleapis/java-spanner-jdbc/commit/f2ac8e392e972d326bc5702855385471febea87c))

---
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