Fix Editor ActionMode content rectangle

We have made a mistake in a previous change and change the single cursor
selection bounds in a wrong way. 

Test: atest CtsWidgetTestCases:TextViewTest
Bug: 72244890
Change-Id: Ie597ff5a9f82e04d673534e35c49da513132cd5b
diff --git a/core/java/android/widget/Editor.java b/core/java/android/widget/Editor.java
index 41ceb30..9988661 100644
--- a/core/java/android/widget/Editor.java
+++ b/core/java/android/widget/Editor.java
@@ -4186,7 +4186,7 @@
                         primaryHorizontal,
                         layout.getLineTop(line),
                         primaryHorizontal,
-                        layout.getLineBottom(line) - layout.getLineBottom(line) + mHandleHeight);
+                        layout.getLineBottom(line) + mHandleHeight);
             }
             // Take TextView's padding and scroll into account.
             int textHorizontalOffset = mTextView.viewportToContentHorizontalOffset();