ANDROID: sched/core: Move SchedTune task API into UtilClamp wrappers

The main SchedTune API calls realted to task tuning attributes are now
wrapped by more generic and mainlinish UtilClamp calls.

The new APIs are:

 - uclamp_task(p)               <= boosted_task_util(p)
 - uclamp_boosted(p)            <= schedtune_task_boost(p) > 0
 - uclamp_latency_sensitive(p)  <= schedtune_prefer_idle(p)

Let's provide also an implementation of the same API purely
based on mainline and UtilClamp attritutes.

Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
Signed-off-by: Qais Yousef <qais.yousef@arm.com>