[SWDEV-509876] Remove buffer requirement from device counting service (#132)

* [SWDEV-509876] Remove buffer requirement from device counting service

No longer require a buffer to be given when setting up device counting
service. This is to reduce performance overhead in cases where immediate
return of counting samples is being used (synchronous mode).

* Missed file

* Update source/include/rocprofiler-sdk/device_counting_service.h

Co-authored-by: Madsen, Jonathan <Jonathan.Madsen@amd.com>

* Update source/lib/rocprofiler-sdk/counters/controller.cpp

Co-authored-by: Madsen, Jonathan <Jonathan.Madsen@amd.com>

* Update source/lib/rocprofiler-sdk/counters/device_counting.cpp

Co-authored-by: Madsen, Jonathan <Jonathan.Madsen@amd.com>

* Fixes for build

---------

Co-authored-by: Benjamin Welton <ben@amd.com>
Co-authored-by: Madsen, Jonathan <Jonathan.Madsen@amd.com>
Co-authored-by: Benjamin Welton <bewelton@amd.com>

source/lib/rocprofiler-sdk/counters/controller.cpp

@@ -82,7 +82,8 @@ CounterController::configure_agent_collection(rocprofiler_context_id_t context_i
     // cannot coexist in the same context for now.
     if(ctx.pc_sampler) return ROCPROFILER_STATUS_ERROR_CONTEXT_CONFLICT;
 
-    if(!rocprofiler::buffer::get_buffer(buffer_id.handle))
+    if(!rocprofiler::buffer::get_buffer(buffer_id) &&
+       buffer_id != rocprofiler_buffer_id_t{.handle = 0})
     {
         return ROCPROFILER_STATUS_ERROR_BUFFER_NOT_FOUND;
     }