Enable quantized data types for  CpuElementwiseUnary on Armv7a

- Adding fallback functions neon_qasymm8_signed_elementwise_unary() and
  neon_qasymm8_elementwise_unary()
- They would be called in case target is not aarch64

Resolves: COMPMID-5994
Change-Id: Id0db1e7cb0fe92f1eaef0b3a9ed2bea01b3f2a15
Signed-off-by: Ramy Elgammal <ramy.elgammal@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/9416
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Viet-Hoa Do <viet-hoa.do@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Benchmark: Arm Jenkins <bsgcomp@arm.com>
diff --git a/Android.bp b/Android.bp
index f315def..a08bab6 100644
--- a/Android.bp
+++ b/Android.bp
@@ -487,6 +487,8 @@
         "src/cpu/kernels/elementwise_unary/generic/neon/impl.cpp",
         "src/cpu/kernels/elementwise_unary/generic/neon/integer.cpp",
         "src/cpu/kernels/elementwise_unary/generic/neon/q8.cpp",
+        "src/cpu/kernels/elementwise_unary/generic/neon/qasymm8.cpp",
+        "src/cpu/kernels/elementwise_unary/generic/neon/qasymm8_signed.cpp",
         "src/cpu/kernels/floor/neon/fp16.cpp",
         "src/cpu/kernels/floor/neon/fp32.cpp",
         "src/cpu/kernels/fuse_batch_normalization/generic/fp16.cpp",