Some people apparently still talk to the network during their build.
Allow this temporarily with a BUILD_BROKEN_USES_NETWORK check.
Bug: 129992021
Test: attempt to talk to the network during the build with and without
this flag.
Change-Id: Ifb967c656aa24c4599e7232d0f1b5a303b5bac52
And add a helper script that can help parse the output from
build_test.bash
Test: check for BUILD_BROKEN_ENG_DEBUG_TAGS in soong.log
Test: go run ../build/soong/scripts/build_broken_logs.go *
Change-Id: Idd0fc8b59770dcdbe44eeba262558708a9497f96