chore(deps): upgrade to Android API 37

[BartoszLitwiniuk]

Should be merged after #219

Summary

Bumps the project to Android API 37 and refreshes the surrounding build toolchain and dependencies.

Changes

SDK / NDK

• compileSdk 36 → 37 (backtrace-library, example-app)
• targetSdk 36 → 37 (example-app, plus library lint and testOptions blocks)
• NDK 27.3.13750724 → 29.0.14206865

Build tooling

• Shadow plugin migrated from the abandoned com.github.johnrengelman.shadow:8.1.1 to com.gradleup.shadow:9.6.1 (required for Gradle 9 compatibility)
• JaCoCo 0.8.13 → 0.8.15

Dependencies

• backtrace-library: replaced androidx.appcompat:appcompat:1.6.1 with androidx.annotation:annotation:1.10.0 because the library only needed annotations, not the full AppCompat runtime
• example-app: androidx.appcompat:appcompat 1.6.1 → 1.7.1
• Test deps: Mockito (core + android) 5.19.0 → 5.23.0, Guava 33.4.8-jre → 33.6.0-jre

Testing

• Library and example app build against API 37
• Unit and instrumentation test suites pass