Fix issue with camera overlapping split staging UI

Fixes an issue on some devices where initiating a split in Overview would cause an icon to be placed partly under the camera cutout.

Fixed by adding some padding to FloatingTaskView#mSplitPlaceHolderView, so that it always respects the device's insets.

Fixes: 220997064
Test: Manual
Change-Id: I7270bde3320f562519ea8e36a38e49609e0d6cd7

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

@@ -399,7 +399,8 @@ public class LandscapePagedViewHandler implements PagedOrientationHandler {
         // In fake land/seascape, the placeholder always needs to go to the "top" of the device,
         // which is the same bounds as 0 rotation.
         int width = dp.widthPx;
-        out.set(0, 0, width, placeholderHeight);
+        int insetThickness = dp.getInsets().top;
+        out.set(0, 0, width, placeholderHeight + insetThickness);
         out.inset(placeholderInset, 0);
 
         // Adjust the top to account for content off screen. This will help to animate the view in
@@ -411,6 +412,19 @@ public class LandscapePagedViewHandler implements PagedOrientationHandler {
         out.top -= (totalHeight - placeholderHeight);
     }
 
+    @Override
+    public void updateStagedSplitIconParams(FrameLayout.LayoutParams out, float onScreenRectCenterX,
+            float onScreenRectCenterY, float fullscreenScaleX, float fullscreenScaleY,
+            int drawableWidth, int drawableHeight, DeviceProfile dp,
+            @StagePosition int stagePosition) {
+        float inset = dp.getInsets().top;
+        out.leftMargin = Math.round(onScreenRectCenterX / fullscreenScaleX
+                - 1.0f * drawableWidth / 2);
+        out.topMargin = Math.round((onScreenRectCenterY + (inset / 2f)) / fullscreenScaleY
+                - 1.0f * drawableHeight / 2);
+
+    }
+
     @Override
     public void getFinalSplitPlaceholderBounds(int splitDividerSize, DeviceProfile dp,
             @StagePosition int stagePosition, Rect out1, Rect out2) {