Clean and fixed generate esn
Clean and fixed generate esn

now manufacturer string is limited to 5 char
example with nvidia shield:
ro.product.manufacturer = 'NVIDIA'
ro.product.model = 'Shield android tv'
ro.nrdp.modelgroup = 'SHIELDANDROIDTV'
esn output:
old: NFANDROID2-PRV-SHIELDANDROIDTV-NVIDIASHIELD=ANDROID=TV
new: NFANDROID2-PRV-SHIELDANDROIDTV-NVIDISHIELD=ANDROID=TV

hawkeyexp/plugin.video.netflix