COMPMID-3637: Move utility headers from arm_compute to src

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: If9d6fa8c900b68c4b6fd373f2fc1f9abb83ea917
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4145
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/Android.bp b/Android.bp
index f14eb21..59d5995 100644
--- a/Android.bp
+++ b/Android.bp
@@ -412,6 +412,8 @@
         "src/core/Utils.cpp",
         "src/core/Validate.cpp",
         "src/core/Version.cpp",
+        "src/core/helpers/SoftmaxHelpers.cpp",
+        "src/core/helpers/WindowHelpers.cpp",
         "src/core/utils/ScaleUtils.cpp",
         "src/core/utils/helpers/fft.cpp",
         "src/core/utils/helpers/tensor_transform.cpp",