i9103: add a better charger tool, original harms screen

based on moto charge_only_mode tool, cleaned by CM Defy Team
and adapted for the Galaxy R by T.Pruvot (CM Defy Team)

Change-Id: I8222bde7f8a2320fd975d27789e5e24166df8aba
Signed-off-by: Tanguy Pruvot <tanguy.pruvot@gmail.com>