Add WM-side transition trace perfetto tracer

Bug: 309630341
Test: adb shell -t perfetto -c - --txt -o /data/misc/perfetto-traces/trace <<EOF
   unique_session_name: transitions_tracing
   buffers: {
       size_kb: 63488
       fill_policy: RING_BUFFER
   }
   data_sources: {
       config {
           name: com.android.wm.shell.transition
       }
   }
   duration_ms: 10000
EOF

Change-Id: Ia0ddc56170275fa31063243d6f60381d80d5a622