OpenJDK 11: Merging in java.lang.Long (javadoc, trivial changes)

This is part of merging upstream changes from OpenJDK 11.28. This CL
updates javadoc and add trivial code changes.

Bug: 207772338
Test: treehugger
Change-Id: I3f062b695a7a19e5cd405a0e81e9e3d541a4e3b4
1 file changed