Bump com.amazonaws:aws-android-sdk-mobile-client in the gradle group

Bumps the gradle group with 1 update: [com.amazonaws:aws-android-sdk-mobile-client](https://github.com/aws/aws-sdk-android).


Updates `com.amazonaws:aws-android-sdk-mobile-client` from 2.80.0 to 2.81.0
- [Release notes](https://github.com/aws/aws-sdk-android/releases)
- [Changelog](https://github.com/aws-amplify/aws-sdk-android/blob/main/CHANGELOG.md)
- [Commits](aws-amplify/aws-sdk-android@release_v2.80.0...release_v2.81.0)

---
updated-dependencies:
- dependency-name: com.amazonaws:aws-android-sdk-mobile-client
  dependency-version: 2.81.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: gradle
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

app/build.gradle

@@ -80,7 +80,7 @@ dependencies {
     implementation "com.amplifyframework:aws-auth-cognito:${amplify_version}"
 
     // https://mvnrepository.com/artifact/com.amazonaws/aws-android-sdk-mobile-client
-    implementation 'com.amazonaws:aws-android-sdk-mobile-client:2.80.0'
+    implementation 'com.amazonaws:aws-android-sdk-mobile-client:2.81.0'
     // https://mvnrepository.com/artifact/com.amazonaws/aws-android-sdk-cognito
     implementation 'com.amazonaws:aws-android-sdk-cognito:2.20.1'
 }