Disable auto prefer idle if ta prefer_idle is explictly disabled

In auto prefer idle mode, a task in top-app will be granted prefer
idle if it satisfied the conditions. So turn auto prefer idle off
if top-app prefer_idle is explictly disabled.

Bug: 326507991
Test: build pass
Change-Id: I2b4f4f016cc41d963d15b8f37370d86f2046ded0
3 files changed