init: change cpu core online permissions.

-Needed to let the Package Manager enable and disable cores
for Multithreaded Multicore dexopt.
patch: Multithreaded Multicore dexopt.

-We have switched to a single core only startup. However, we can
speed up dexopt by using the switch persist.sys.dalvik.multithread
and this patch which enables all 4 cores for only boot dexopt.
patch: missing binder symbols.