As IKE is used in the frameworks for IKEv2/IPsec VPNs, IKE stubs
must be built and added to the frameworks build process

Bug: 147096727
Test: build, flash, boot
Test: FrameworksNetTests, FrameworksIkeTests passing
Change-Id: I51aad4ab800442d018bb170225c114a4ae5ea3b1