[1/2] Base: Wireless Power Saver

- When screen has been off for 5 minutes, wifi is not connected, and with no heavy data traffic, turn off 3G/LTE
- When screen is turned back on reset to original network type

Based on commit https://gerrit.paranoidandroid.co/#/c/456/ by Curtis Mayers.
Moved from telephony service to system_server so feature doesn't get overriden by google's dialer and telephony service

PS2:
- If data traffic is too heavy, delay check by 5 minutes
- Clean up white spaces

Change-Id: I0bb6990b6334eeacfd9ee24b77f2d240949e101b
Add needed Methods to toggle LTE and mobile data type

Credits to PA!

Change-Id: I1f47069ad12d59cb52ad6539ae5cd7b5cc5ecd2f