signal strength fix

Change-Id: I5227c7bb65328f899bc0ceb2ed33398682b4c10c
add comments to RIL + changes in power_profile.xml

Change-Id: I5d63b69e1705c6f9a048f125b6930e16af3379f6
Merge pull request #28 from jied83/jellybean

Jellybean