setRelease

Starts the release animation.

If the view is currently pressed (mIsPressed is true), this method will:

• Set mIsPressed to false.
• Cancel any ongoing animation.
• Set up the animator to animate from the current animated value to 1.0f (original scale).
• Set the animation duration to mReleaseDuration.
• Set the interpolator to sReleaseInterpolator.
• Start the animation.