Aggressive Battery: fix auto enable on battery saver

Currently the receiver used for battery saver is in SmartPixelsReceiver,
however the receiver in SmartPixelsReceiver is only registered if Smart
Pixels is enabled. This commit just moves the settings changes when
battery saver is enabled to the receiver in DeviceIdleController, since
I think it makes more sense to put it in there than in
SmartPixelsReceiver.

Change-Id: I9773e246ed980170b4c582301df059f1e58f9a4f
Signed-off-by: shagbag913 <sh4gbag913@gmail.com>
Signed-off-by: Ayan Mukherjee <mukherjeeayan725@gmail.com>
1 file changed