Fix java.util.zip.ZipFile with OPEN_DELETE.

openJdk java.util.zip.ZipFile with OPEN_DELETE flag
uses unlink to remove the file just after it's opened.

This is causing trouble on /storage partition, we
can read/write unlinked file easily, but lseek seems
to fail with ENOENT.

This change introduces alternative implementation that
doesn't use unlink before closing the file.

Bug: 28901232
Bug: 28950284
Change-Id: I871a84e9a14bc1b4b9d5b0faa207579e27bcfc81