Remove CurveProperties#pageParentScale

Test: Set TaskView#EDGE_SCALE_DOWN_FACTOR = 0.2f, then swipe
down on the centermost TaskView; ensure it fills the screen.
Alternatively, touch and hold the nav bar and ensure there is
no jump in scale on the app window.

Fixes: 169259407
Change-Id: Ib3cfba6ebafbcb90de9c6b1ab79f53605d995321
Merged-In: Ib3cfba6ebafbcb90de9c6b1ab79f53605d995321

quickstep/recents_ui_overrides/src/com/android/quickstep/util/TaskViewSimulator.java

@@ -250,7 +250,6 @@ public class TaskViewSimulator implements TransformParams.BuilderProxy {
             int start = mOrientationState.getOrientationHandler()
                     .getPrimaryValue(mTaskRect.left, mTaskRect.top);
             mScrollState.screenCenter = start + mScrollState.scroll + mScrollState.halfPageSize;
-            mScrollState.pageParentScale = recentsViewScale.value;
             mScrollState.updateInterpolation(start);
             mCurveScale = TaskView.getCurveScaleForInterpolation(mScrollState.linearInterpolation);
         }

quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java

@@ -1390,13 +1390,12 @@ public abstract class RecentsView<T extends StatefulActivity> extends PagedView
          * Updates linearInterpolation for the provided child position
          */
         public void updateInterpolation(float childStart) {
-            float scaledHalfPageSize = halfPageSize / pageParentScale;
-            float pageCenter = childStart + scaledHalfPageSize;
+            float pageCenter = childStart + halfPageSize;
             float distanceFromScreenCenter = screenCenter - pageCenter;
             // How far the page has to move from the center to be offscreen, taking into account
             // the EDGE_SCALE_DOWN_FACTOR that will be applied at that position.
             float distanceToReachEdge = halfScreenSize
-                    + scaledHalfPageSize * (1 - TaskView.EDGE_SCALE_DOWN_FACTOR);
+                    + halfPageSize * (1 - TaskView.EDGE_SCALE_DOWN_FACTOR);
             linearInterpolation = Math.min(1,
                     Math.abs(distanceFromScreenCenter) / distanceToReachEdge);
         }

src/com/android/launcher3/touch/LandscapePagedViewHandler.java

@@ -72,7 +72,6 @@ public class LandscapePagedViewHandler implements PagedOrientationHandler {
         out.halfPageSize = view.getNormalChildHeight() / 2;
         out.halfScreenSize = view.getMeasuredHeight() / 2;
         out.screenCenter = insets.top + view.getPaddingTop() + out.scroll + out.halfPageSize;
-        out.pageParentScale = view.getScaleY();
     }
 
     @Override

src/com/android/launcher3/touch/PagedOrientationHandler.java

@@ -111,7 +111,6 @@ public interface PagedOrientationHandler {
         public int halfPageSize;
         public int screenCenter;
         public int halfScreenSize;
-        public float pageParentScale;
     }
 
     class ChildBounds {

src/com/android/launcher3/touch/PortraitPagedViewHandler.java

@@ -70,7 +70,6 @@ public class PortraitPagedViewHandler implements PagedOrientationHandler {
         out.halfPageSize = view.getNormalChildWidth() / 2;
         out.halfScreenSize = view.getMeasuredWidth() / 2;
         out.screenCenter = insets.left + view.getPaddingLeft() + out.scroll + out.halfPageSize;
-        out.pageParentScale = view.getScaleX();
     }
 
     @Override