ANDROID: vendor_hooks: add hooks for f2fs issue checkpoint

Add hooks to solve the priority inversion. while the key thread needs
to update fs data, it should wake and wait for f2fs checkpoint thread
to complete the work. So one scheme is needed to ensure the priority
of checkpoint thread especially in CPU high load scenarios.

Bug: 388166014
Bug: 375088532
Change-Id: Iaa181cd1c8368310d9dd4c78adda6c7add5858b3
Signed-off-by: yipeng xiang <yipengxiang@honor.corp-partner.google.com>
(cherry picked from commit b910ce6b)