Documentation update for VCN, JPEG, rocDecode and rocJPEG feature (#109)

* Documentation update for VCN, JPEG, rocDecode and rocJPEG feature

Update documents to include the new tracks for tracing VCN and JPEG
activity.
Update the rocDecode and rocJPEG tracing enabled using ROCprofiler-SDK.
Update headings to the perfetto output images.

* Add few more lines about domain values.

* Add missing words to the dictionary

README.md

@@ -62,11 +62,15 @@ The documentation source files reside in the [`/docs`](/docs) folder of this rep
 - HIP kernel tracing
 - HSA API tracing
 - HSA operation tracing
+- rocDecode API tracing
+- rocJPEG API tracing
 - System-level sampling (via rocm-smi)
   - Memory usage
   - Power usage
   - Temperature
   - Utilization
+  - VCN Utilization
+  - JPEG Utilization
 
 ### CPU Metrics