ANDROID: page_alloc: add new vendor hook to try alloc pages with gfp

Add new vendor hook to get pages with gfp from vendor implemented pool.
Vendor hook trace_android_rvh_try_alloc_pages() was previously added via
https://android-review.googlesource.com/c/kernel/common/+/3184382

.

But there were missing gfp_t in the commit, which is needed for
page allocation. So add a new vendor hook with gfp.

Bug: 351175506
Change-Id: I64b382b8d6d528d58146f32ebabe2883234f2653
Signed-off-by: Sooyong Suk <s.suk@samsung.corp-partner.google.com>