Fix build breakage on -user build

Bug: 242145724
Test: Build any -user product
Change-Id: Id34f14a834919f1e381d0365d50847cb52cedf8d
diff --git a/fs_mgr/fs_mgr_overlayfs.cpp b/fs_mgr/fs_mgr_overlayfs.cpp
index 0b1eb39..354d02a 100644
--- a/fs_mgr/fs_mgr_overlayfs.cpp
+++ b/fs_mgr/fs_mgr_overlayfs.cpp
@@ -81,6 +81,9 @@
     return filesystems.find("\t" + filesystem + "\n") != std::string::npos;
 }
 
+const auto kLowerdirOption = "lowerdir="s;
+const auto kUpperdirOption = "upperdir="s;
+
 }  // namespace
 
 #if ALLOW_ADBD_DISABLE_VERITY == 0  // If we are a user build, provide stubs
@@ -328,9 +331,6 @@
     return "";
 }
 
-const auto kLowerdirOption = "lowerdir="s;
-const auto kUpperdirOption = "upperdir="s;
-
 static inline bool KernelSupportsUserXattrs() {
     struct utsname uts;
     uname(&uts);