Added AIDL for CellIdentityCdma, CellIdentityGsm, CellIdentityLte and CellIdentityWcdma. This is the preliminary change for IWLAN refactoring as network registration state will be moving into system API. Test: Build bug: 64132030 Change-Id: I6763d4b6e51cf354b01ee5bfb5d37114394f3063