[Tizen] Make InternalState for animation. So ensure Stop() Play() make the playstate...

[Tizen] Make InternalState for animation. So ensure Stop() Play() make the playstate is Playing

Since there is no way to determine that Animation::HasFinished() function called
due to we call Stop() API, or Animation finished normally.

To seperate the state, let we make new internal state
: STOPPING, PLAYING_DURING_STOPPING, PAUSED_DURING_STOPPING

STOPPING will be changed as STOPPED after Animation::HasFinished() function called.

And also, make CLEARED state so we can easly control Clear() function call.

Change-Id: I2acccfaaa034dd1edc956e4a23b0726b5d1b65e7
Signed-off-by: Eunki, Hong <eunkiki.hong@samsung.com>