Set up Vold switchable pair to allow swapping internal/external SD

Uncomment the line persist.sys.vold.switchexternal=1 in bulid prop
to use

Change-Id: I396339722605c5de2dcca567561fbddbfcd5d8dc
Move ro.telephony.ril.v3 to data/local.prop to allow setting change

Change-Id: I01277d72d5160df33f86cbc7172da3f406228a08
Add world_phone config

Change-Id: I2eaf65b75f825a07a6fae00fa4084370b175c9d6