Fix: Insertion handle can be moved just by tapping.

Horizontal poistion is passed to updatePosition() without
adding getHorizontalOffset(). The position is wrong for the
insertion handle; thus, the handle is moved just by tapping
on it.

Bug: 20923263
Change-Id: Ie867ebd9e6b682057b73373fefb7b2baf45caef9

core/java/android/widget/Editor.java

@@ -3687,7 +3687,8 @@ public class Editor {
                     }
                     mTouchToWindowOffsetY = newVerticalOffset + mLastParentY;
 
-                    final float newPosX = rawX - mTouchToWindowOffsetX + mHotspotX;
+                    final float newPosX =
+                            rawX - mTouchToWindowOffsetX + mHotspotX + getHorizontalOffset();
                     final float newPosY = rawY - mTouchToWindowOffsetY + mTouchOffsetY;
 
                     updatePosition(newPosX, newPosY);