Bug 940884 - 1/3: B2G SMS: Create MobileMessageDB.jsm for automation tests. r=khuey
Bug 940884 - 2.a/3.  Changes to adopt MobileMessageDB.jsm.
Bug 940884 - 2.b/3. Move init functions out of MobileMessage constructor.
Bug 940884 - 3/3. test cases.
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