Fix Smooth Display screen recording

Only look at the peak refresh rate of the default display to determine if the back up smooth display feature flag has been turned on/off.

Add missing tests for turning off Smooth Display and Force Peak Refresh Rate.

Bug: 327562842
Test: adb shell dumpsys settings
Test: adb shell dumpsys display
Test: atest DisplayModeDirectorTest
Change-Id: I24e6ab3763b9276e976a9f1e4d85d86d4a4d284c