chore: prepare release v6.2.0

[TheRealAgentK]

Summary

• bump the provider version to 6.2.0 and version code to 60200099
• document the dependency updates from chore(deps): update build and runtime dependencies #304
• document removal of the direct AndroidX Core dependency and safer telephony fallback behavior from feat: Remove direct AndroidX Core dependency #305
• document the CI action update from chore(deps): bump actions/checkout from 6 to 7 #298

Release rationale

This is a minor release because the published dependency metadata changes materially while the public API and ABI remain compatible. Consumers no longer inherit AndroidX Core as a direct provider dependency, and the release remains compatible with compile SDK 36.

Validation

• ./gradlew --no-daemon spotlessCheck app:lint provider:lint app:assembleDebug provider:assembleDebug provider:test publishToMavenLocal
• inspected the locally published 6.2.0 POM: expected Kotlin 2.4.0, Gson 2.14.0, and OkHttp 5.4.0 dependencies; no direct AndroidX Core dependency
• inspected release AAR metadata: minCompileSdk=36