Loading lower and higher blocking zone refresh rates

This is to fix the issue where the lower and higher blocking zone
refresh rate are set to the default and peak refresh rates, causing
unexpected behaviours in the refresh rates of both the blocking zones

Bug: 264418555
Test: atest DisplayDeviceConfigTest DisplayModeDirectorTest
Test: Manual
Merged-In: I04d2fff7af7643149c9a9f7107765c160fb3f483
Change-Id: I72f6c5c2d746bdd85fcf1be4e95d1529084046f3
(cherry picked from commit d184f2f1)