SchismWizard: Google-y redesign [Part 3]

Another commit for SchismWizard and this one consists
of some clean-up and build error fixes along with some
minor polishing.

Here is the detailed list:
    1) We add "default_margin" dimen to fix build error
    2) We remove some unneeded colors to get clean-up
    3) Make the google image height smaller
    4) Add in our new buttons drawables
    5) Fix-up some margins to get things aligned
    6) Other minor clean-up I guess

    Its another big commit though that should mostly fix
    all current issues with the design. Close to being finished!

    Signed-off-by: Chintan Shah <cgintan1998@gmail.com>

Signed-off-by: Chintan Shah <cgintan1998@gmail.com>