rild: Don't use the clientId argument with non-qcom hardware

Other modems' implementations won't know how to deal with it, and
some are confirmed to simply reject the RIL_Init call.

If the hardware isn't qualcomm, just skip the whole multi-ril stuff
entirely

Change-Id: I132a4d7fc3d4532b2015f7e95863fac78889f833

rild: Weaken the RIL_setRilSocketName symbol

custom libril implementations won't have it, but its lack isn't
fatal outside of multi-SIM

Change-Id: If8312078921bb4ed756dcd86e17e85847638c155