Refactor PerfettoProtoLogImpl classes to take the datasource object directly...

Refactor PerfettoProtoLogImpl classes to take the datasource object directly and be enabled and disabled on demand

This avoid us having to pass a builder function to the class for test,
but also means that we can easily re-create an instance when needed and
pass the same datasource so we don't end up creating and registering a
datasource on each instance creation.

We also now have the ability to easily toggle the protolog tracing on
demand to easily switch between implementation instances when needed.

Flag: android.tracing.perfetto_protolog_tracing
Bug: 369560789
Test: atest TracingTests
Change-Id: I8da7123cbd665d1c289c4c994db181c4de433826