message: Apply output_min/output_max to the result in the NEON implementation of Add operator.
  Both non-NEON and reference implementation have this, but it's missing from NEON version.
diff: @@ -1583,6 +1583,8 @@ inline void Add(int left_shift, const uint8* input1_data,
  TFLITE_DCHECK_LT(input1_offset, 256);
  TFLITE_DCHECK_LT(input2_offset, 256);
  #ifdef USE_NEON
  + const auto output_activation_min_vector = vdup_n_u8(output_activation_min);
  + const auto output_activation_max_vector = vdup_n_u8(output_activation_max);
  for (; i <= size - 8; i += 8) {
  const auto input1_val_original = vld1_u8(input1_data + i);
  const auto input2_val_original = vld1_u8(input2_data + i);
  @@ -1628,7 +1630,10 @@ inline void Add(int left_shift, const uint8* input1_data,
  const auto s2_narrowed = vmovn_s32(s2);
  const auto s = vaddq_s16(vcombine_s16(s1_narrowed, s2_narrowed),
  vdupq_n_s16(output_offset));
  - vst1_u8(output_data + i, vqmovun_s16(s));
  + const auto clamped =
  + vmax_u8(output_activation_min_vector,
  + vmin_u8(output_activation_max_vector, vqmovun_s16(s)));
  + vst1_u8(output_data + i, clamped);
  }
  #endif // NEON
  