Add --wipe-and-use-fbe option to fastboot for FBE userdata marker.

With this option, userdata is wiped and recreated with the
"convert_fbe" file in the root, which triggers conversion to FBE.

Bug: 25898323
Change-Id: I9347b7057b6278e7e6437504896b22c82dd01d89
diff --git a/fastboot/fs.h b/fastboot/fs.h
index 289488b..0a68507 100644
--- a/fastboot/fs.h
+++ b/fastboot/fs.h
@@ -1,11 +1,13 @@
 #ifndef _FS_H_
 #define _FS_H_
 
+#include <string>
 #include <stdint.h>
 
 struct fs_generator;
 
 const struct fs_generator* fs_get_generator(const std::string& fs_type);
-int fs_generator_generate(const struct fs_generator* gen, int tmpFileNo, long long partSize);
+int fs_generator_generate(const struct fs_generator* gen, int tmpFileNo, long long partSize,
+    const std::string& initial_dir);
 
 #endif