Add libprocessgroup dependency required for set_sched_policy function.
Include sched_policy_ctrl.h header which now contains set_sched_policy
definition.

Cherry-picked from c3aba7a3 in sdm845 branch.

Bug: 111307099
Bug: 131328001
Test: builds, boots
Change-Id: Ia01e3ed6237407eef9cfc882853ad9d7697bbc63
Signed-off-by: Dhina17 <dhinalogu@gmail.com>