Preventing pictures from blinking during contact sync.

We were clearing photo cache on every notification from the cursor. There is no reason to do so
and a good reason to not do so. We used to build a sparse array based on the cursor position,
which would have to be invalidated when the cursor re-queried. It's soft cache based on the photo
id, so it can be kept around across those reloads.

Change-Id: I3f7fdcabbbeb09983410f8d092f31647df8fd698
diff --git a/src/com/android/contacts/ContactsListActivity.java b/src/com/android/contacts/ContactsListActivity.java
index 0f83a18..5e8519e 100644
--- a/src/com/android/contacts/ContactsListActivity.java
+++ b/src/com/android/contacts/ContactsListActivity.java
@@ -2315,11 +2315,6 @@
 
             // Update the indexer for the fast scroll widget
             updateIndexer(cursor);
-
-            // Clear the photo bitmap cache, if there is one
-            if (mBitmapCache != null) {
-                mBitmapCache.clear();
-            }
         }
 
         private void updateIndexer(Cursor cursor) {