Swipe should delete in spam

Fixes b/7147157 Swiping on Spam should delete not remove from label

Change-Id: I198a76d9ef516f12ccb5509e4fbb4f22e672320e
diff --git a/src/com/android/mail/ui/ConversationListFragment.java b/src/com/android/mail/ui/ConversationListFragment.java
index fb5e2d7..7cb6e67 100644
--- a/src/com/android/mail/ui/ConversationListFragment.java
+++ b/src/com/android/mail/ui/ConversationListFragment.java
@@ -48,6 +48,7 @@
 import com.android.mail.providers.UIProvider;
 import com.android.mail.providers.UIProvider.AccountCapabilities;
 import com.android.mail.providers.UIProvider.FolderCapabilities;
+import com.android.mail.providers.UIProvider.FolderType;
 import com.android.mail.providers.UIProvider.Swipe;
 import com.android.mail.ui.SwipeableListView.SwipeCompleteListener;
 import com.android.mail.ui.ViewMode.ModeChangeListener;
@@ -582,7 +583,8 @@
             mListView.enableSwipe(false);
         } else {
             int action;
-            if (ConversationListContext.isSearchResult(mViewContext)) {
+            if (ConversationListContext.isSearchResult(mViewContext)
+                    || (mFolder != null && mFolder.type == FolderType.SPAM)) {
                 action = R.id.delete;
             } else if (mFolder == null) {
                 action = R.id.remove_folder;