Convert Address to Kotlin

[Copilot]

Converts Address (in mail/common) from Java to Kotlin, consistent with the project's ongoing Java→Kotlin migration (e.g., recent Attachment class conversion).

Key changes

• Address.java → Address.kt: Full rewrite in idiomatic Kotlin
• Java interop preserved: @JvmStatic on all companion object methods, @JvmOverloads on constructor to generate both Address(String) and Address(String, String) overloads; Kotlin property getters (address, personal, hostname) generate the expected getAddress(), getPersonal(), getHostname() accessors for Java callers
• Null safety improvements: parseUnencoded/parse use Kotlin's isNullOrEmpty() for proper smart-cast instead of delegating to TextUtils.isEmpty(); requireNotNull replaces manual null check + throw in the parse constructor branch
• toString(Array<Address>?) uses joinToString directly instead of TextUtils.join (which expects Array<Any> and is invariant in Kotlin)
• Fixed gradle.properties JVM args that were comma-separated instead of space-separated, preventing the Gradle daemon from starting

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• dl.google.com
  • Triggering command: /usr/lib/jvm/temurin-21-jdk-amd64/bin/java /usr/lib/jvm/temurin-21-jdk-amd64/bin/java --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-opens=java.base/java.nio.charset=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.xml/javax.xml.namespace=ALL-UNNAMED --add-opens=java.base/java.time=ALL-UNNAMED -XX:+UseG1GC -XX:SoftRefLRUPolicyMSPerMB=1 -XX:ReservedCodeCacheSize=512m -XX:InitialCodeCacheSize=256m -XX:+HeapDumpOnOutOfMemoryError (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

---

🔒 GitHub Advanced Security automatically protects Copilot coding agent pull requests. You can protect all pull requests by enabling Advanced Security for your repositories. Learn more about Advanced Security.