Add messaging exception status for "attachment not found"

* Adding this enables 4409976 to be fixed in a user-friendly manner

Bug: 4409976
Change-Id: I4f5ce890b6957c27a0f59656467dbe23b480a7e3

emailcommon/src/com/android/emailcommon/mail/MessagingException.java

@@ -60,6 +60,8 @@ public class MessagingException extends Exception {
     public static final int AUTHENTICATION_FAILED_OR_SERVER_ERROR = 13;
     /** The server refused access */
     public static final int ACCESS_DENIED = 14;
+    /** The server refused access */
+    public static final int ATTACHMENT_NOT_FOUND = 15;
 
     protected int mExceptionType;
     // Exception type-specific data

res/values/strings.xml

@@ -415,6 +415,9 @@ save attachment.</string>
     <string name="attachment_info_apk_install_disabled">
             Applications can\'t be installed directly from Email. First save
             this application and then install it using the Downloads application.</string>
+    <!-- Error banner when an attachment could not be downloaded due to a problem at the server
+            [CHAR LIMIT=100] -->
+    <string name="attachment_not_found">The attachment could not be downloaded.</string>
 
     <!-- String used in place of a message that could not be properly decoded (e.g. bad base64
          data was received.) [CHAR LIMIT=none] -->

src/com/android/email/Controller.java

@@ -1594,8 +1594,10 @@ public class Controller {
                 case EmailServiceStatus.ACCESS_DENIED:
                     return new MessagingException(MessagingException.ACCESS_DENIED);
 
-                case EmailServiceStatus.MESSAGE_NOT_FOUND:
                 case EmailServiceStatus.ATTACHMENT_NOT_FOUND:
+                    return new MessagingException(MessagingException.ATTACHMENT_NOT_FOUND);
+
+                case EmailServiceStatus.MESSAGE_NOT_FOUND:
                 case EmailServiceStatus.FOLDER_NOT_DELETED:
                 case EmailServiceStatus.FOLDER_NOT_RENAMED:
                 case EmailServiceStatus.FOLDER_NOT_CREATED:

src/com/android/email/MessagingExceptionStrings.java

@@ -35,6 +35,8 @@ public class MessagingExceptionStrings {
         switch (e.getExceptionType()) {
             case MessagingException.IOERROR:
                 return R.string.account_setup_failed_ioerror;
+            case MessagingException.ATTACHMENT_NOT_FOUND:
+                return R.string.attachment_not_found;
             case MessagingException.TLS_REQUIRED:
                 return R.string.account_setup_failed_tls_required;
             case MessagingException.AUTH_REQUIRED: