Fixed network request not detached from data network

When clients remove the network request, the network request
was not properly detached from data network because the
network request is generated by telephony network factory again.

This can cause network score calculation issue when data switch
happens.

Fix: 232963488
Test: atest DataNetworkControllerTest + Basic testing + voice call
data temp switching

Merged-In: I88e2284ad1183943b773c407685fada5974f94b3
Change-Id: I88e2284ad1183943b773c407685fada5974f94b3