Allow saving attachments even if there's no intent handling them.

For e.g. compressed files that doesn't mean they can't be opened, as
they still can be unpacked by the file manager.

Change-Id: I53c80b7bedb44732bc1cf346a83c1f6e39fb0da0

provider_src/com/android/email/AttachmentInfo.java

@@ -180,7 +180,6 @@ public class AttachmentInfo {
         List<ResolveInfo> activityList = pm.queryIntentActivities(intent, 0 /*no account*/);
         if (activityList.isEmpty()) {
             canView = false;
-            canSave = false;
             denyFlags |= DENY_NOINTENT;
         }