Migrate from material2 to material3

This completely gets rid of the material2 dependencies and only use
material3 dep instead.

ModalBottomSheet is the only component we need that is not yet available
in material3, so we keep a local copy of the material2 code backed by
material3 themes, per material3 team's suggestion.

Note that the get flow is paid very little care and will look more rough
after this change. I'll fix it when I get it functional next.

Recording of the create flow: https://drive.google.com/file/d/1i_OCgnKtYF1lAiBX03DL4guxWb24VC86/view?usp=sharing&resourcekey=0-NGXhxXkQyak9OCsFjtZbRA

Bug: 254102161
Test: local deployment

Change-Id: Ide41b450230a8ccc12790117891283b28ef75dd1