Revert "Revert "Add RIL interface for setNullCipherAndIntegrityEnabled""

This reverts commit 011b2b41.
A few small fixes are included with this revert commit, namely
switching to use HAL_SERVICE_NETWORK in NetworkResponse.java and
RIL.java, and mHalVersion in RIL.java.

Bug: b/237529943
Test: m
Change-Id: If48c55cb4a13b39e0d30d4cdbd9a23b88cb0de45