CompactFormatter support for LogRecord::getLongThreadID

[jmehrens]

JDK16 added new a method LogRecord::getLongThreadID and deprecated LogRecord::getThreadID. Changes are filed under: JDK-8245302 - Upgrade LogRecord to support long thread ids and remove its usage of ThreadLocal

The CompactFormatter supports formatting thread ids so the code should be modified to prefer calling LogRecord::getLongThreadID and fallback toLogRecord::getThreadID only if it the long version is not present. This will allow the formatter to support newer JDKs without introducing dependency on the newer JDK version.

This issue is forward port of jakartaee/mail-api#529

For Android, MethodHandles are only available in Oreo | 8.0.0

https://source.android.com/setup/start/build-numbers
https://developer.android.com/reference/java/lang/invoke/package-summary

[jmehrens]

Committed as:
6ee9fec