Tracking bug for necko pref flips
https://bugzilla.mozilla.org/show_bug.cgi?id=1874137
Enable network.http.http2.move_to_pending_list_after_network_change https://bugzilla.mozilla.org/show_bug.cgi?id=1876045
https://bugzilla.mozilla.org/show_bug.cgi?id=1874137
Enable network.http.http2.move_to_pending_list_after_network_change https://bugzilla.mozilla.org/show_bug.cgi?id=1876045