Update dumpstate code that dumps BPF maps.

dumpsys netd trafficcontroller no longer does anything useful
because that information has moved to the mainline module.

Run dumpsys connectivity trafficcontroller instead, which ouputs
the same information.

Test: none
Bug: 234084920
Change-Id: I7b50ffcc62f04c336379fbbd7ea0106a91aac15f