ANDROID: task_mmu: add vendor hook for swap entry

Add vendor hook in smaps_pte_entry for swap entry
- android_vh_smaps_pte_entry
- android_vh_show_smap

This vendor hook is to show more information for
swap entries of a process based on the
characteristics, such as written-back, same-filled
or huge (uncompressed).

Bug: 284059805

Change-Id: Ie4a48ae42212c056992d34a10b026b60439d0012
Signed-off-by: Sooyong Suk <s.suk@samsung.com>