Allow applying an OTA package manually from cache.

Change-Id: I8f78377555c658a992ca95cadf11b67ddc93fed8
diff --git a/recovery_ui.h b/recovery_ui.h
index e56a24b..5f01770 100644
--- a/recovery_ui.h
+++ b/recovery_ui.h
@@ -76,6 +76,7 @@
 #define ITEM_APPLY_SDCARD    1  // historical synonym for ITEM_APPLY_EXT
 #define ITEM_WIPE_DATA       2
 #define ITEM_WIPE_CACHE      3
+#define ITEM_APPLY_CACHE     4
 
 // Header text to display above the main menu.
 extern char* MENU_HEADERS[];