Align naming convention of ClMatMul

Ensure naming of MatMul on GPU conforms to the naming convention <backend><operator><config> i.e. ClMatMul operator with the backend ClMatMulNativeKernel.

Resolves: COMPMID-6015

Change-Id: I021d235b023ad17fe97bd6913e6a50d0ba4b194e
Signed-off-by: Jakub Sujak <jakub.sujak@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/9443
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 e38ea65..4bd3074 100644
--- a/Android.bp
+++ b/Android.bp
@@ -695,8 +695,8 @@
         "src/gpu/cl/kernels/ClIm2ColKernel.cpp",
         "src/gpu/cl/kernels/ClIndirectConv2dAddressPrecalculationKernel.cpp",
         "src/gpu/cl/kernels/ClIndirectConv2dKernel.cpp",
+        "src/gpu/cl/kernels/ClMatMulNativeKernel.cpp",
         "src/gpu/cl/kernels/ClMulKernel.cpp",
-        "src/gpu/cl/kernels/ClNativeMatMulKernel.cpp",
         "src/gpu/cl/kernels/ClPermuteKernel.cpp",
         "src/gpu/cl/kernels/ClPool2dKernel.cpp",
         "src/gpu/cl/kernels/ClPool3dKernel.cpp",