ANDROID: mm: differentiate folio origins to improve reclaim decisions

Differentiate the origin of folios (pages) in memory—whether they were
allocated through madvise hints, explicit user read calls, page faults,
or the kernel’s readahead mechanism—and leverage this classification
during memory reclaim. By tracking the source of each folio, the kernel
can make more informed eviction decisions and improve overall memory
management efficiency.

Bug: 442743231
Change-Id: If7c275952f6336dde81d366b8b67722e5996c724
Signed-off-by: Yang Yang <yang.yang@vivo.com>