Move inputservice over to frameworks/native

Remove all of the pieces except the PointerController and SpriteController over
to frameworks/native in preparation for inputflinger. Those two need to stay in
frameworks/base for now because they depend on Skia currently. In the long run
they should be merged into either the InputManager or the WindowManager rather
than as a part of the inputservice / inputflinger.

Change-Id: Iebef71f3030fb3d26a5f338eb66d75bb37c17734