ANDROID: mm: Add vendor hook for compact pages work.

To monitor the efficiency of each action about compaction.
Add the vendor_hook function and call it in kcompactd_do_work() and
try_to_compact_pages()

ANDROID vendor hook
android_vh_compaction_exit(int, int, const int)
android_vh_compaction_try_to_compact_pages_exit(enum *compact result)

Bug: 301044280

Change-Id: I4c3f94e77eb2b16ba154ba88a9f75095536de916
Signed-off-by: John Hsu <john.hsu@mediatek.com>