WifiNetworkFactory: Send abort to UI

Whenever the current active request is aborted (released by the app or
overridden by another request), send an abort to the UI via new
callback.

Bug: 113878056
Test: ./frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Change-Id: I867c41fe88a0c8cc663d39fc10e84745576f2935
2 files changed