Revert submission 1194951-ThreadPrioritySetter2
Reason for revert: need to update new API
Reverted Changes:
Iee33a26c0: Implement the ThreadPrioritySetter interface
I71c5052be: Use ThreadPrioritySetter to set thread priority
Change-Id: I38c1335bff657662d82ff8778bffade323ced620