Fixed crash during SetupWizard.

Sometimes the setup activity gets destroyed when launch the Google account setup.
If that happens, don't fire the page finished callback.

Change-Id: If0476645665c58a05f9dfc5fe664076c0a41aeac
Move previous/next to the bottom of the setup wizard.

Change-Id: I88e594a1421ee701f0f2aeb5299df76273126bab
Remove the MOD divider.

Change-Id: I19d4eab9b0955edb7b8a8e91de376163c34433d4