fix: avoid race conditions when fetching background trace

[hoxyq]

Summary

This includes 2 changes:

1. If the panel query parameter is specified, which we are using to pre-open Timeline panel, we are going to static import it. If we will load it dynamically, there could be scenarios when it won't subscribe to ReactNativeApplication domain in time and will miss the required event to prepare for a incoming trace.
2. Inside the TimelineController, update the TracingClient state synchronously first. This happens on start() event. if we don't do it, there are chances that tracingComplete() event could be handled first and it won't capture the trace.

Test plan

• This change maintains backwards compatibility with previous Local Storage data (if modifying settings, experiments, or other persisted client state).

Upstreaming plan

• This commit should be sent as a patch to the upstream devtools-frontend repo following the contribution guide for Meta employees OR contribution guide.
• This commit is React Native-specific and cannot be upstreamed.