ANDROID: vendor_hooks: Add hooks for __alloc_pages_direct_reclaim

Provide a vendor hook to allow drain_all_pages to be skipped
during direct reclaim in some cases to avoid delays caused by
it in cases when the benefits of draining pcp lists are known
to be small.

Bug: 220811627
Bug: 231802812
Signed-off-by: Liujie Xie <xieliujie@oppo.com>
Change-Id: I0805241f81e0a94afcf62c98e97cff125d4061e2
(cherry picked from commit ebbf267f)
Signed-off-by: Carlos Llamas <cmllamas@google.com>