LG8n has peak refresh rates higher than
60 Hz, so allow users to toggle high-refresh rate like on stock.
Change-Id: If757492b40d23c6742378a1ec0c7b3ece31ad720
Signed-off-by: Shirayuki39 <lorddemecrius83@proton.me>
X6883B supports switching between 60, 90 and 120 Hz refresh rates,
so let's expose it in Settings -> Display -> Peak refresh rate for users to save
battery if necessary.
Test: visual confirmation after toggling several times
Change-Id: Ia206c495e3f40f583f8cd35e7753c30a5e917656
Signed-off-by: dodyirawan85 <40514988+dodyirawan85@users.noreply.github.com>