SF: query RefreshRateConfigs for kernel idle timer support

Use the per-display idle timer configuration instead of the global one.

Bug: 188838426
Test: check graphics.display.kernel_idle_timer.enabled can only be
      toggled when the active display is a display that supports kernel
      idle timer.
Change-Id: I4b2258723ed52eb6e94daaff04f65b80d9d0c9d5
2 files changed