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.

[jmehrens]

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]

This was committed to v1.x branch and will be forward ported to AngusMail.