WindowInsetsAnimationController: Fix minor API issues

- make sure we only dispatch the controller in onCancelled after the app has seen onReady
- return a linearly interpolated getFraction() if there is no interpolator instead of -1

Bug: 118118435
Test: atest WindowInsetsAnimationControllerTests
Change-Id: Iccd0b6246b4cdc250f3111409821c1dac53c694e

1 files changed, 2 insertions, 3 deletions

diff --git a/core/java/android/view/WindowInsetsAnimation.java b/core/java/android/view/WindowInsetsAnimation.java
index e32648809f8f..cf5e7e3d3e26 100644
--- a/core/java/android/view/WindowInsetsAnimation.java
+++ b/core/java/android/view/WindowInsetsAnimation.java
@@ -110,14 +110,13 @@ public final class WindowInsetsAnimation {
      * and 1.
      * </p>
      * @see #getFraction() for raw fraction.
-     * @return The current interpolated progress of this animation. -1 if interpolator isn't
-     *         specified.
+     * @return The current interpolated progress of this animation.
      */
     public float getInterpolatedFraction() {
         if (mInterpolator != null) {
             return mInterpolator.getInterpolation(mFraction);
         }
-        return -1;
+        return mFraction;
     }
 
     /**