BACKPORT: UPSTREAM: binder: rename lru shrinker utilities

Now that the page allocation step is done separately we should rename
the binder_free_page_range() and binder_allocate_page_range() functions
to provide a more accurate description of what they do. Lets borrow the
freelist concept used in other parts of the kernel for this.

No functional change here.

Signed-off-by: Carlos Llamas <cmllamas@google.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Link: https://lore.kernel.org/r/20231201172212.1813387-23-cmllamas@google.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Bug: 254650075
(cherry picked from commit ea9cdbf0)
Change-Id: I0d0dfcc6f72d54209da310be2ad5e30f3d722652
[cmllamas: fixed trivial conflicts due to missing commits e33c267a
 95a542da]
Signed-off-by: Carlos Llamas <cmllamas@google.com>