Android O 修改开发者选项中动画缩放的默认值

• frameworks/base/core/res/res/values/config.xml

	<item name="config_appTransitionAnimationDurationScaleDefault" format="float" type="dimen">0.5</item>

• frameworks/base/services/core/java/com/android/server/wm/WindowManagerService.java

	private float mWindowAnimationScaleSetting = 0.5f;
    private float mTransitionAnimationScaleSetting = 0.5f;
    private float mAnimatorDurationScaleSetting = 0.5f;