Fix weird split-screen secondary task animation

As CL[1] corrects the screenBounds of remote animation target,
and we are now using RemoteAnimationTarget#localBounds to offect the
position.

Remove the offset logics in AppWindowAnimationHelper#updateSourceStack,
and TaskViewSimulator#setPreview, then refine computeSurfaceParams
with offseting the position of HOME task by localBounds.

[1]: I793f01fb290fe65af1bbf8e29e429fbca63ac255

Fix: 153581126
Test: manual as below steps:
     1) Launch a app, swipe up to overview screen.
     2) Tap app icon and pressing "Split screen" item.
     3) After entered split-screen mode, taps the task view.
     4) Make sure the secondary task animation the movement is
        correct and smoothly.

Change-Id: I0e4ed1465e80f48336908813ac694fb3aaa3c347

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

@@ -107,9 +107,6 @@ public class AppWindowAnimationHelper implements TransformParams.BuilderProxy {
     private void updateSourceStack(RemoteAnimationTargetCompat target) {
         mSourceInsets.set(target.contentInsets);
         mSourceStackBounds.set(target.screenSpaceBounds);
-
-        // TODO: Should sourceContainerBounds already have this offset?
-        mSourceStackBounds.offsetTo(target.position.x, target.position.y);
     }
 
     public void updateSource(Rect homeStackBounds, RemoteAnimationTargetCompat target) {
@@ -186,14 +183,14 @@ public class AppWindowAnimationHelper implements TransformParams.BuilderProxy {
         crop.offsetTo(0, 0);
         float cornerRadius = 0f;
         float scale = Math.max(mCurrentRect.width(), mTargetRect.width()) / crop.width();
+        mTmpMatrix.setTranslate(0, 0);
+        if (app.activityType == RemoteAnimationTargetCompat.ACTIVITY_TYPE_HOME) {
+            mTmpMatrix.setTranslate(app.localBounds.left, app.localBounds.top);
+        }
         if (app.mode == targetMode
                 && app.activityType != RemoteAnimationTargetCompat.ACTIVITY_TYPE_HOME) {
             mTmpMatrix.setRectToRect(mSourceRect, mCurrentRect, ScaleToFit.FILL);
-            if (app.localBounds != null) {
-                mTmpMatrix.postTranslate(app.localBounds.left, app.localBounds.top);
-            } else {
-                mTmpMatrix.postTranslate(app.position.x, app.position.y);
-            }
+            mTmpMatrix.postTranslate(app.localBounds.left, app.localBounds.top);
             mCurrentClipRectF.roundOut(crop);
             if (mSupportsRoundedCornersOnWindows) {
                 if (params.getCornerRadius() > -1) {

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

@@ -15,8 +15,6 @@
  */
 package com.android.quickstep.util;
 
-import static android.view.Surface.ROTATION_0;
-
 import static com.android.launcher3.states.RotationHelper.deltaRotation;
 import static com.android.launcher3.touch.PagedOrientationHandler.MATRIX_POST_TRANSLATE;
 import static com.android.quickstep.util.RecentsOrientedState.postDisplayRotation;
@@ -130,8 +128,6 @@ public class TaskViewSimulator implements TransformParams.BuilderProxy {
         mThumbnailData.windowingMode = WINDOWING_MODE_FULLSCREEN;
 
         mThumbnailPosition.set(runningTarget.screenSpaceBounds);
-        // TODO: Should sourceContainerBounds already have this offset?
-        mThumbnailPosition.offset(-mRunningTarget.position.x, -mRunningTarget.position.y);
         mLayoutValid = false;
     }
 

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

@@ -472,7 +472,6 @@ public class TaskThumbnailView extends View implements PluginListener<OverviewSc
             } else {
                 setThumbnailRotation(deltaRotate, thumbnailInsets, scale, thumbnailPosition);
             }
-            mMatrix.postTranslate(-thumbnailPosition.left, -thumbnailPosition.top);
 
             final float widthWithInsets;
             final float heightWithInsets;