UiApp code split from IntelFrameworkModulePkg/Universal/BdsDxe driver.

This is the UI part of the old BdsDxe driver, also remove the legacy boot option related code.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18111 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Application/UiApp/String.c

@@ -0,0 +1,67 @@
+/** @file
+  String support
+
+Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution.  The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "Ui.h"
+#include "Language.h"
+#include "FrontPage.h"
+
+EFI_HII_HANDLE gStringPackHandle;
+
+EFI_GUID mUiStringPackGuid = {
+  0x136a3048, 0x752a, 0x4bf6, { 0xa7, 0x57, 0x9, 0x36, 0x11, 0x95, 0x38, 0xed }
+};
+
+/**
+  Initialize HII global accessor for string support.
+
+**/
+VOID
+InitializeStringSupport (
+  VOID
+  )
+{
+  gStringPackHandle = HiiAddPackages (
+                         &mUiStringPackGuid,
+                         gImageHandle,
+                         UiAppStrings,
+                         NULL
+                         );
+  ASSERT (gStringPackHandle != NULL);
+}
+
+VOID
+UninitializeStringSupport (
+  VOID
+  )
+{
+  HiiRemovePackages (gStringPackHandle);
+}
+
+/**
+  Get string by string id from HII Interface
+
+
+  @param Id              String ID.
+
+  @retval  CHAR16 *  String from ID.
+  @retval  NULL      If error occurs.
+
+**/
+CHAR16 *
+GetStringById (
+  IN  EFI_STRING_ID   Id
+  )
+{
+  return HiiGetString (gStringPackHandle, Id, NULL);
+}