Telephony: Battery Saver mode [4/4]

Change-Id: I199c8682a09889ad5e9d36a6d235b14518530ccd
Signed-off-by: MURA Stefano [STELIX PippoX3] <ssspinni@gmail.com>
Merge "Telephony: Battery Saver mode [4/4]" into kk