Add traces to latency sensitive points

Those places have been identified as the main culprit of unfold latency in sysui doing some method tracing. By adding traces, we can monitor them better in perfetto recordings.

Bug: 197515205
Test: recorded a trace and checked if they were there.
Change-Id: I6f1d111b7fb33fabeba604e62d4208f5ca1f03d1