intellidemand: add bug fixes

 - Fix crash input event handler on governor switch
 - Fix panic when setting sampling rate

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: add a run queue persistence to determine browsing state

persistence will allow for better browsing state detection rather than just
purely based on run queue depth alone

Signed-off-by: faux123 <reioux@gmail.com>
intellidemand: add minimum cpu performance lock

a minimum cpu frequency performance lock is add to ensure smooth
operations when only 1 core is active

Signed-off-by: faux123 <reioux@gmail.com>