Add ripple and remove weird piece-meal animation where items came in after the card.

Also, update to minds 21 to use <ripple>.

Still to-do: figure out how to make the bottom sheet come up under the navigation bar instead of on top of it.
Fix ripple not going to the edge of the menu and let the manifest merge the minSdkVersion
Merge pull request #2 from twotoasters/add-ripple

Add ripple and remove weird piece-meal animation where items came in after the card