even though we have set physical_power_button_center_screen_location_y
and config_is_powerbutton_fps, the system doesnt use the power button
location for the fingerprint sensor
There's no point to keep using custom pref to set minimum refresh rate
when AOSP smooth display feature behaves in the exact same way in
our case.
Set default peak refresh rate to 60, as this is the same value when the user
turns on and off the smooth display setting.
If its turned on, it will go to 144 Hz.
Change-Id: I497918a9c9687443a9438fb6291769f6e51d9379
