am 197a8fea: Add sample "san-angeles" program to demo OpenGL ES from native code.

Merge commit '197a8fea8e9ae0552b0d20fb5ba4562a851c1bca'

* commit '197a8fea8e9ae0552b0d20fb5ba4562a851c1bca':
  Add sample "san-angeles" program to demo OpenGL ES from native code.