Framework:Power Widget Support (1/4) (Phone)

This commit adds the Power widget for phones.  All toggles should work
except for LTE (disabled for now)

Patch set 2  - Fixes Sync toggle
Patch set 3  - Removes WIP
Patch set 4  - Rebase
               Switch to MultiSelectListPreference

Patch set 5 - 16
- some fixes

Patch set 17
- whitespace cleanup
- added some license text
- remove background on toggles for future ports of slim stuff
- some small cosmetic things
Change-Id: I104ca847cf004792c4a1b4b0c3b6acace9355fa1