OpenJDK 11: Merging in java.lang.Long (update bit methods)

This is part of merging upstream changes from OpenJDK 11.28. This CL
updates some APIs working with bit representation:

 * highestOneBit(int)
 * numberOfLeadingZeros(int)
 * reverse(int)

Bug: 207841289
Test: treehugger
Change-Id: I8bb6a9754f104404474d432e7c3a05fb3612f932
1 file changed