Trebuchet: Default workspace fixes

* Replace AnalogClockWidget by cLock Widget
* Add "no telephony" workspaces files. New favorites:
    - Phone -> Email
    - Contacts -> Calendar
    - Mms -> Contacts
    - Browser -> Browser
* Add sw600dp and sw700dp update workspaces files

Change-Id: I41e81f908339b68df8109611c88ee092b4ab7b9d
Launcher3 : Default workspace improvements

Ported from cm-10.2

Adds support for fallback in default_workspace

Change-Id: I2590ae2d5e3c1b6124061581b9ffa206d611c608