fix: in-app messages not displaying for release builds on Android

[levibostian]

Ships the latest Android SDK bug fix to RN customers.

Tasks left to complete before merging this PR.

• Enable proguard in sample apps. After enabling proguard, push commit to this PR to assert proguard is enabled in the future for sample app builds.
• QA test sample app builds (that are now using proguard). Send device an in-app message. In-app message should appear on the device.

[github-actions]

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