ANDROID: Add symbol of get_next_event_cpu back

Recover symbol of `get_next_event_cpu` which was removed
from a3bf0efb ("ANDROID: Add allowed symbols from sctp.ko
and qrtr.ko") frozen ABI.

Bug: 173765853
Signed-off-by: Lucas Wei <lucaswei@google.com>
Change-Id: Ib61e8f977047e2e61a1a0e8014af942e7d1d1b67