ril: Enable/disable IPv6 on interface layer according to apn settings

Enable/disable IPv6 on rmnet0 or rmnet1 according to apn settings through sysfs
/proc/sys/net/ipv6/conf/rmnetX/disable_ipv6

Change-Id: I87cce07b81f89c47e625d30fae88b85f2d7740ad
1 file changed