installd create_data_user_ce_path uses dir instead of symlink

Select whichever is real dir instead of symbolic link from either
/data/data or /data/user/0. This is to minimize path walking overhead
in kernel.

Test: Manual test
Change-Id: Ie06640624746ff40a2b5b47ead50a7f10eb2db3e
Signed-off-by: cjbao <cathy.bao@intel.com>