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 5.11.1 is the latest desired version of launchdarkly-android-client-sdk
• Build and run the example app on an emulator or device to confirm it still connects and evaluates flags correctly

Notes

• Single-line change in app/build.gradle; no README update needed as it does not reference the SDK version
• No Gradle lock file to update (not committed in this repo)

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

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