Revert "Add a crappy fix for signal strength"

This reverts commit 74546c7ffcc4480780a60a4315b95ea179453a4d.
Port CM's responseStringsNetworks
Temporarily use prebuilt cm libril until I can work out how it's built
Ugly hax to correct the radio technology id sent by prebuilt ril

CM corrects DC-HSPAP to their own value (30). We want to just mask it to
HSPAP (15) instead.