Revert "Mobile Network Battery Saver Mode"

Option is available on CDMA devices and picks invalid modes when toggled.

This reverts commit f5a1b3208164154f1b304e9630a639b153b6948e.

Change-Id: Idec5e9ef2340c173b717a1fafc4c42222d50b2d2
Merge "Revert "Mobile Network Battery Saver Mode"" into kk44