Fix the logic of the Center Play Button icon selection

[EmreDET]

Hello, this is a small fix. We saw that the plugin has a logical error whenever we did not initialize the video, the icon for the play button would show the "reload"-icon. This happens because: _latestValue.position >= _latestValue.duration indicates, that if duration was 0, the initial position would also be 0, therefore the video player icon logic falsely assumed that the video needs to be "reloaded" from the beginning. With this simple fix && _latestValue.duration.inSeconds > 0 we ensure, that it should only be treated as "isFinished" if the duration is non-zero, therefore was initialized. If needed, we can even do && _latestValue.duration.inMilliseconds > 0 or _latestValue.duration.inMicroseconds > 0, for further precision.
Please correct me if I have made a mistake.

Thank you for your time and efforts.
Emre Y.

[MrJohnDev]

Good!