RRS: Apply the default config from persist prop

vendor_config plays as another role to control the display config during
the boot time. To change the default configuration of the user selected
mode, we use persist config to store the value.

Bug: 232721840
Test: Boot w/ and w/o user selected configs and check the resolution
Change-Id: I8e6f551817e9b7cb747a7f5351430dd2ac9b4624

device-cheetah.mk

@@ -86,7 +86,7 @@ PRODUCT_DEFAULT_PROPERTY_OVERRIDES += vendor.display.brightness.dimming.usage=1
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += vendor.primarydisplay.lhbm.frames_to_reach_peak_brightness=2
 
 # Display RRS default Config
-PRODUCT_DEFAULT_PROPERTY_OVERRIDES += vendor.display.primary.default_boot_config=1080x2340@120
+PRODUCT_DEFAULT_PROPERTY_OVERRIDES += persist.vendor.display.primary.boot_config=1080x2340@120
 
 # NFC
 PRODUCT_COPY_FILES += \