Fix memory leak of SkMovie class

Movie class doesn't have finalize method.
So memory leak of SkMovie class of native Skia occurs when Movie class is released.
I add finalize method to Movie class (Movie.java) and jni destructor method to SkMovie class (Movie.cpp).

Change-Id: I4dae9dd95f128cbfade50bef978b219ba99321dd
2 files changed