OpenJDK 11: Merging in java.util.jar.JarEntry

This is part of merging upstream changes from OpenJDK 11.28. This CL
updates java.util.jar.JarEntry.

There is a new API added in java.util.jar.JarEntry:
 * public String getRealName();

A test was added for the new API.

Test: m droid
Test: atest JarEntryTest
Change-Id: I4fbaf331eed02f1be9b19c749b47bad3a5fa20be
3 files changed