chore: Update Android SDK from 5.11.0 to 5.11.1

[kinyoklion]

Summary

Bumps the LaunchDarkly Android Client SDK dependency from 5.11.0 to 5.11.1 (patch release).

Review & Testing Checklist for Human

• Verify CI build passes — this is an Android project and the build was not tested locally
• Confirm 5.11.1 is the latest published version of com.launchdarkly:launchdarkly-android-client-sdk on Maven Central
• Build and run the example app on an emulator or device to confirm it initializes the SDK and evaluates a flag successfully

Notes

Single-line patch version bump. No API changes expected. No README update needed since it does not reference the SDK version.

Link to Devin session: https://app.devin.ai/sessions/707962703f2540d5b8c92734ecf9e33a
Requested by: @kinyoklion

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