Distorted Android

First attempt at the 'Mirror' app.

Fix a lot of Lint warnings in the apps.

1. (hopefully) finish the 'Save' app (now we can adjust the size of the resulting file)
2. Fix one long-standing bug in almost every single app.

Turn the former 'FOV' app into 'Projection' app that also checks the (x,y) the camera looks at.

Improve Around The World

Make the effect Center be always 3D.

Unify Effects3D and Matrix3D (still incomplete!)

Minor

Encode more info in the EfectNames enum.

Progress with "Around The World"