Add suberror for network errors

Author: rpdome

msal/src/main/java/com/microsoft/identity/client/PublicClientApplication.java

@@ -1647,7 +1647,7 @@ private MsalException baseExceptionToMsalException(@NonNull final BaseException
             );
         }
 
-        return new MsalClientException(exception.getErrorCode(), exception.getMessage());
+        return MsalExceptionAdapter.msalExceptionFromBaseException(exception);
     }
 
     /**

msal/src/main/java/com/microsoft/identity/client/internal/controllers/MsalExceptionAdapter.java

@@ -42,6 +42,12 @@
 public class MsalExceptionAdapter {
 
     public static MsalException msalExceptionFromBaseException(final BaseException e) {
+        final MsalException result = msalExceptionFromBaseExceptionInternal(e);
+        result.setSubErrorCode(e.getSubErrorCode());
+        return result;
+    }
+
+    private static MsalException msalExceptionFromBaseExceptionInternal(final BaseException e) {
         if (e instanceof MsalException) {
             return  (MsalException) e;
         }
@@ -69,7 +75,7 @@ public static MsalException msalExceptionFromBaseException(final BaseException e
             final UiRequiredException uiRequiredException = ((UiRequiredException) e);
             return new MsalUiRequiredException(
                     uiRequiredException.getErrorCode(),
-                    uiRequiredException.getOAuthSubErrorCode(),
+                    uiRequiredException.getSubErrorCode(),
                     uiRequiredException.getMessage()
             );
         }