IVGCVSW-1875 Proper support for NHWC L2Normalization
IVGCVSW-1875 Proper support for NHWC L2Normalization

 * Removed input/output swizzling from ConvertL2Normalization

Change-Id: I623d878617614aec4d1f41556839808e6184a350

ARM-software/android-nn-driver,ARM-software/android-nn-driver