Re-evaluate detached unsatisfied network request

If a network request is detached from the network after no longer
satisfied, data network controller should re-evaluate the network
request again so it can attempt to bring up another network that
can satisfy that request.

Fix: 228996685
Test: atest DataNetworkControllerTest
Test: Basic phone functionality tests
Change-Id: Ie847e7783a12663e3918c6cc27ea2c817cf88152