RMX1921: Move some props from vendor.prop to system.prop

To fix errors like:
E (7)[1:init]: Do not have permissions to set 'ro.min.fling_velocity' to '160' in property file '/vendor/build.prop': SELinux permission check failed
E (7)[1:init]: Do not have permissions to set 'ro.max.fling_velocity' to '20000' in property file '/vendor/build.prop': SELinux permission check failed
E (7)[1:init]: Do not have permissions to set 'vendor.hw.fm.init' to '0' in property file '/vendor/build.prop': SELinux permission check failed
E (7)[1:init]: Do not have permissions to set 'persist.dbg.ims_volte_enable' to '1' in property file '/vendor/build.prop': SELinux permission check failed

Signed-off-by: Dakkshesh <dakkshesh5@gmail.com>
Signed-off-by: kaderbava <ksbava7325@gmail.com>