OpenJDK 11: Merging in java.lang.String (minimize diff with upstream)

This is part of merging upstream changes from OpenJDK 11.28. This CL
minimizes the diff between upstream by adding upstream code under
change markers.

Bug: 202962059
Test: treehugger
Change-Id: I192c7d20d05c2859fa065b2930af5d46ef28a29b
1 file changed