Mark progress updates from AbsSeekBar.trackTouchEvent as from user

Looks like this one was missed in Iafa32538b4f92705c4c1ca2a02145c078add2532
when setProgress(int, boolean) went from setProgress(progress, fromUser) to
setProgress(progress, animate)

BUG=24416333

Change-Id: Id22f4d67986a24c907f61e22866ae43ffdfe79b8

core/java/android/widget/AbsSeekBar.java

@@ -666,7 +666,7 @@ public abstract class AbsSeekBar extends ProgressBar {
         progress += scale * max;
 
         setHotspot(x, (int) event.getY());
-        setProgress((int) progress, true);
+        setProgressInternal((int) progress, true, false);
     }
 
     /**