hammerhead: update build fingerprint and description to MOB30P
hammerhead: update build fingerprint and description to MOB30P

Change-Id: I77564e744c34afb0a6e8db534e0d9dac743a7f6d

maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead,maruos/android_device_lge_hammerhead