javac wants us to be more explicit

src/org/thoughtcrime/securesms/ConversationAdapter.java

@@ -43,6 +43,7 @@ import org.thoughtcrime.securesms.service.MessageNotifier;
 import ws.com.google.android.mms.MmsException;
 
 import java.util.LinkedHashMap;
+import java.util.Map.Entry;
 
 /**
  * A cursor adapter for a conversation thread.  Ultimately

src/org/thoughtcrime/securesms/crypto/MessageDisplayHelper.java

@@ -26,6 +26,7 @@ import org.thoughtcrime.securesms.util.InvalidMessageException;
 
 import java.lang.ref.SoftReference;
 import java.util.LinkedHashMap;
+import java.util.Map.Entry;
 
 public class MessageDisplayHelper {
 

src/org/thoughtcrime/securesms/mms/ImageSlide.java

@@ -22,6 +22,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.lang.ref.SoftReference;
 import java.util.LinkedHashMap;
+import java.util.Map.Entry;
 
 import org.thoughtcrime.securesms.R;
 import org.thoughtcrime.securesms.crypto.MasterSecret;

src/org/thoughtcrime/securesms/mms/TextSlide.java

@@ -18,6 +18,7 @@ package org.thoughtcrime.securesms.mms;
 
 import java.io.UnsupportedEncodingException;
 import java.util.LinkedHashMap;
+import java.util.Map.Entry;
 
 import org.thoughtcrime.securesms.crypto.MasterSecret;