Pin Adjust SDK dependency to major 5

[nickolas-dimitrakas]

Summary

• Update the published Adjust SDK dependency from exact 5.0.0 to the bounded major-5 range [5.0.0,6.0.0).
• Align Android kit dependency behavior with the iOS Adjust 5 kit's up-to-next-major constraint.

Validation

• Root mparticle-android-sdk: trunk check
• Root mparticle-android-sdk: ./gradlew build
• Root mparticle-android-sdk: ./gradlew test
• Root mparticle-android-sdk: ./gradlew ktlintCheck
• Adjust kit: ./gradlew build
• Adjust kit: ./gradlew test
• Adjust kit: ./gradlew ktlintCheck
• Adjust kit: ./gradlew generatePomFileForReleasePublication

Generated release POM confirms com.adjust.sdk:adjust-android is emitted as [5.0.0,6.0.0).