Constellation can now optionally report memory usage when the page is loaded. (#37151)

The constellation can now tell the memory reporter to report the memory
to a trace file when a page is loaded.
Additionally, we amend the memory reporter to allow a simple message
where it will report the memory to a tracing provider (at the moment
only OHOS/hitrace is supported but easy extension is possible).

I am not sure if this is the right approach or if the embedder should
decide to have the memory reporting done.

Testing: This does not change functionality of any of the rendering.

---------

Signed-off-by: Narfinger <Narfinger@users.noreply.github.com>

components/profile/mem.rs

@@ -114,7 +114,6 @@ impl Profiler {
                 let _ = sender.send(MemoryReportResult { results });
                 true
             },
-
             ProfilerMsg::Exit => false,
         }
     }