ANDROID: cgroup: Add vendor hook to the cgroup

Add a vendor hook after attaching a task to a cgroup to 
recognize the group_id for performance tuning

Bug: 181917687

Signed-off-by: Frankie Chang <frankie.chang@mediatek.com>
Change-Id: I603afa3d893dd575a7dcb97f83bd9eacb8315bab
(cherry picked from commit bed1e2a75b0000d99a00177272b93e5c8430308b)