Battery LED: put a state summary (enable/disable)

Change-Id: Iba7648d6c96ed193db2296ee28d18fa4f00e0a30
Signed-off-by: houst0nn <houstonn@gmail.com>
SoundSettings: Assigning a null to an unnecessary variable

Change-Id: Ic8c3e6ff66cc888f6069e3bbef666ede3c56dc13