Add inline on-device note translation

[ewbd09-svg]

Closes #1055

Supersedes #1093 after completing the required Lightning Bounties GitHub account authorization.

Summary

• add inline note translation through Android's on-device translation framework
• detect the source language locally and translate to the app/device language
• keep note text on the device with no API key, remote endpoint, or third-party dependency
• expose loading, success, already-translated, unavailable, and retry states
• translate the complete rendered note text instead of the collapsed feed preview

Compatibility

• available on Android 12 (API 31) and newer when the device provides an on-device translation service
• hidden on older Android versions

Verification

• ./gradlew ktlintCheck
• ./gradlew detekt
• ./gradlew :app:testAospDebugUnitTest (340 tests)
• ./gradlew :app:compileAospDebugKotlin
• verification run: https://github.com/ewbd09-svg/primal-android-app/actions/runs/29633532201