mango: some cleanup

* Removed Phone overlay (mdpi fix is merged in Phone app)
* Added & fixed some comments to the source files
* Reorganized alphabetically proprietary files list
* recovery.fstab: convert tabs to spaces
* Move gsm feature xml to mogami-common

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: Ie2321f467202796cef44aa789e8c010c60d084a1