Add Perfetto part of NetworkTraceHandler am: a603ce5b8e am: a2fbe9760a

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2381737

Change-Id: I7c37cb8440840451196aaf46aafa814c5d37b26c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>