Don't try to log to logcat before the service is ready to trace messages to logcat

This means we need to wait for the relevant parts of the viewer config to be loaded into memory.

Flag: EXEMPT minor bug fix
Bug: 369052956
Test: atest TracingTests
Change-Id: I1472eaccb309ac6b3eccbf4a6b58aab8dc51b9b1
3 files changed