ANDROID: mm: page_pinner: add state of page_pinner

To keep track of page migration failures, record the following
page states to capture natural state transitions of a page during
migration:

  * detected
  * put reference count
  * free

With such transition change, it was a lot easier to analyze page
migration failure issues. Since we already have annotation on the
put_page side, this patch adds the record in free path and page
migration failure path.

Bug: 192475091
Signed-off-by: Minchan Kim <minchan@google.com>
Change-Id: I18182d3fd62850c5580c9e89a5362bdae630f153