sm8450-common: Move default network property to vendor partition

This fixes GSI image overriding the default value

Bug: 153852350
Test: Manually verified after flashing the GSI image
Change-Id: I78b415862c420c23121ec03d6953814cd628ea9a

properties/system.prop

@@ -11,7 +11,6 @@ ro.vendor.qti.va_aosp.support=1
 DEVICE_PROVISIONED=1
 persist.vendor.data.mode=concurrent
 ril.subscription.types=NV,RUIM
-ro.telephony.default_network=33,33
 telephony.lteOnCdmaDevice=1
 
 # Sensors

properties/vendor.prop

@@ -184,6 +184,7 @@ persist.vendor.radio.dynamic_sar=1
 persist.vendor.radio.enableadvancedscan=true
 persist.vendor.radio.procedure_bytes=SKIP
 persist.vendor.radio.sib16_support=1
+ro.telephony.default_network=33,33
 
 # RCS
 persist.vendor.rcs.singlereg.feature=1