android:kernel:charge:optimize the soc report when battery_empty

when battery is empty, it's late to report 0%(the voltage may drop to 2.8v)

Change-Id: I59f58d4e219dc36aaabc3d47430eec106cdec814
(cherry picked from commit 197ccd43604f0de3b3ce07021664939c2df27ba6)
1 file changed