Canonicalize additional Android-changed comments.

Some "Android-changed" lines in ojluni were still part of
block comments, which is inconsisten with the style guide.
This CL fixes these to be more in line with the style guide.

Bug: 35841464
Test: treehugger build succceeds

Change-Id: I4fa630867b3a9d6604fa90d751a52063ec69778c
11 files changed