Add dump function for trafficController

Add a dumpsys helper function in trafficController to dump out the
information of the trafficController that is running on device. If
trafficController is running bpf programs, dump out all the program
location status and all the map content to dumpsys.

Test: dumpsys netd should trafficController information.
bug: 74411823
Merged-In: Ica83c11b6d1debb59f9c3a703d5b5cfc264844c4
Change-Id: Ica83c11b6d1debb59f9c3a703d5b5cfc264844c4
(cherry picked from aosp commit ef297179)