Fix documentation errors

Fix typos.
Fix javadoc error.
Fix wrong instructions about new returning null.

Change-Id: I76bca22e386839007fc99667b07649a4ced4180f
diff --git a/core/java/android/view/SurfaceView.java b/core/java/android/view/SurfaceView.java
index 7021604..6451d47 100644
--- a/core/java/android/view/SurfaceView.java
+++ b/core/java/android/view/SurfaceView.java
@@ -65,7 +65,7 @@
  * Surface is created and destroyed as the window is shown and hidden.
  * 
  * <p>One of the purposes of this class is to provide a surface in which a
- * secondary thread can render in to the screen.  If you are going to use it
+ * secondary thread can render into the screen.  If you are going to use it
  * this way, you need to be aware of some threading semantics:
  * 
  * <ul>