Hardware/ril (DSDS): Add DSDS support
Add interface changes to support DSDS.
Add support to handle two clients.
Add ril_msim.h for all definitions related to DSDS.
Add msimreference-ril to support DSDS with emulator.

from codeaurora
https://www.codeaurora.org/cgit/external/simcom/platform/hardware/ril/commit/?h=jb-8930-master-dsda&id=b14172b3197510d22d1845f3219ef40b1368d980