Added lightweight exception logging to AsyncQueryHandler.

Without this, it's really hard to debug exceptions coming
over from a ContentProvider.  This is lightweight logging
that is only triggered by an exception, and doesn't write a
full stacktrace.
diff --git a/core/java/android/content/AsyncQueryHandler.java b/core/java/android/content/AsyncQueryHandler.java
index ac851cc..c5606ac 100644
--- a/core/java/android/content/AsyncQueryHandler.java
+++ b/core/java/android/content/AsyncQueryHandler.java
@@ -85,6 +85,7 @@
                             cursor.getCount();
                         }
                     } catch (Exception e) {
+                        Log.d(TAG, e.toString());
                         cursor = null;
                     }