Revert "updated Android.mk + changed visibility to Curve and Point in Animation"

This reverts commit 6b9ad5cb3ed4426776571b847b02ef5d9f686ad6.
Merge branch 'master' of https://github.com/stratboy61/Gameplay
Merge branch 'master' of https://github.com/stratboy61/Gameplay
Merge branch 'master' of https://github.com/stratboy61/Gameplay
Merge branch 'master' of https://github.com/stratboy61/Gameplay