Revert "Add RIL interface for setNullCipherAndIntegrityEnabled"

Revert submission 20283075-setNullCipherAndIntegrityEnabled

Reason for revert:
DroidMonitor: Potential culprit for Bug b/259163733 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Reverted Changes:
Idad17af0a:Add setNullCipherAndIntegrityEnabled CTS to IRadio...
Ia72f7bdd6:Add constants for setNullCipherAndIntegrityEnabled...
I5ea99cb06:Add setNullCipherAndIntegrityEnabled to IRadioNetw...
I53403d9f7:Add RIL interface for setNullCipherAndIntegrityEna...

Change-Id: Ie9d339a660f21b0db3cce32fcce218ebb7264aff