Merge change 1916 into donut

* changes:
  Revise the ImageButton class description to include information about XML <selector> drawables, for managing button state.
tree: 86c64d116eaac51929862972aad138d36860b474
  1. awt/
  2. camera/
  3. cmds/
  4. im/
  5. include/
  6. libs/
  7. opengl/
  8. MODULE_LICENSE_APACHE2
  9. NOTICE