Move all error messages to strings.xml

Change-Id: I7c42d6f9b9f9565a02209d654ad52724f09b9ed9
CMBugreport: Cleanup

* 755 -> 644 permissions
* Delete useless files
* Cleanup code & code formatting
* Move submit button to action bar
* Add copyright headers
* Improve strings
* Remove launcher shortcut

Change-Id: I8f2524fe8368b31ad3a6943f3180d882abe1ff76