deps: update dependency io.grpc:grpc-stub to v1.44.1 (#291)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [io.grpc:grpc-stub](https://togithub.com/grpc/grpc-java) | `1.44.0` -> `1.44.1` | [![age](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.44.1/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.44.1/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.44.1/compatibility-slim/1.44.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/io.grpc:grpc-stub/1.44.1/confidence-slim/1.44.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>grpc/grpc-java</summary>

### [`v1.44.1`](https://togithub.com/grpc/grpc-java/releases/v1.44.1)

##### **Bug Fixes**

-   xds: fix the validation code to accept new-style CertificateProviderPluginInstance wherever used ([#&#8203;8901](https://togithub.com/grpc/grpc-java/issues/8901) fixes [#&#8203;8885](https://togithub.com/grpc/grpc-java/issues/8885))
-   binder: Fix a ServiceConnection leak ([#&#8203;8861](https://togithub.com/grpc/grpc-java/issues/8861) closes [#&#8203;8726](https://togithub.com/grpc/grpc-java/issues/8726))
-   android: fix for app coming to foreground ([#&#8203;8904](https://togithub.com/grpc/grpc-java/issues/8904) closes [#&#8203;8850](https://togithub.com/grpc/grpc-java/issues/8850))

</details>

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grpc-google-iam-v1/build.gradle

@@ -18,7 +18,7 @@ repositories {
 }
 
 dependencies {
-  compile 'io.grpc:grpc-stub:1.44.0'
+  compile 'io.grpc:grpc-stub:1.44.1'
   compile 'io.grpc:grpc-protobuf:1.44.1'
   compile project(':proto-google-iam-v1')
 }