Add missing direct conv2d tests to dynamic fusion

* Add direct conv2d tests as a separate fixture so that we can enable
future direct conv2d specific tests
* Move Conv2dAttributes to its own file

Partially resolves COMPMID-5736

Change-Id: I530649488faf3bbed1a4fc7d16a74063bfdf33db
Signed-off-by: SiCong Li <sicong.li@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/8928
Reviewed-by: Gunes Bayir <gunes.bayir@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/Android.bp b/Android.bp
index b02d104..f426f2f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -587,9 +587,9 @@
         "src/cpu/operators/internal/CpuGemmAssemblyDispatch.cpp",
         "src/dynamic_fusion/runtime/gpu/cl/ClKernelRuntime.cpp",
         "src/dynamic_fusion/runtime/gpu/cl/ClWorkloadRuntime.cpp",
-        "src/dynamic_fusion/sketch/OperatorAttributes.cpp",
         "src/dynamic_fusion/sketch/attributes/CastAttributes.cpp",
         "src/dynamic_fusion/sketch/attributes/ClampAttributes.cpp",
+        "src/dynamic_fusion/sketch/attributes/Conv2dAttributes.cpp",
         "src/dynamic_fusion/sketch/attributes/DepthwiseConv2dAttributes.cpp",
         "src/dynamic_fusion/sketch/attributes/Pool2dAttributes.cpp",
         "src/dynamic_fusion/sketch/attributes/ReshapeAttributes.cpp",