SF: reset idle state when RefreshRateConfigs changes

RefreshRateConfigs calls back into Scheduler for updating the idle timer.
When RefreshRateConfigs changes as a result of the active display changed,
we need to stop the idle timer on the old RefreshRateConfigs and reset
Scheduler's state.

Bug: 205664808
Test: manual using below steps
1. Boot device on unfold state
2. Fold device
3. Unfold device
4. Launch Chrome from taskbar

Change-Id: I554fe2b2447c0ad662f06329ff74e0b9b3e999b3