Add android app dev related scaffolding

[komali2]

Summary

Added a bunch of learnings from my android dev experiments. Also included some required things like how an app should be namespaced under the 508 org for fdroid/google play.

Validation

• Ran the narrowest relevant checks.
• Updated docs or examples when behavior changed.

Risk

• Low risk, isolated change.
• Needs reviewer attention for migrations, deploy behavior, permissions, secrets, or user-facing flows.

Screenshots

Add screenshots or recordings for UI changes.

[coderabbitai]

Important

• 🔍 Trigger review

This repository does not receive automatic reviews because it has fewer than 10 stars.

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Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: aa31ab15-77bc-4783-9898-1458fea996c2

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