Move ContactLoader related code to ContactsCommon

This CL simply moves classes from Contacts into ContactsCommon.

This is needed so that Dialer can use ContactLoader related code
for b/11294679. A ContactLoader will also be needed in the future
to allow InCallUI to download hi-res photos while in call.
Bug: 11294679

Change-Id: Ia033f3ea2406a907a4e71290c9ce810a5583dab8
diff --git a/src/com/android/contacts/ContactsApplication.java b/src/com/android/contacts/ContactsApplication.java
index 82b2a25..95fad48 100644
--- a/src/com/android/contacts/ContactsApplication.java
+++ b/src/com/android/contacts/ContactsApplication.java
@@ -32,7 +32,7 @@
 import com.android.contacts.common.ContactPhotoManager;
 import com.android.contacts.common.list.ContactListFilterController;
 import com.android.contacts.common.model.AccountTypeManager;
-import com.android.contacts.test.InjectedServices;
+import com.android.contacts.common.test.InjectedServices;
 import com.android.contacts.common.util.Constants;
 import com.google.common.annotations.VisibleForTesting;