Adding libc++fs to recovery available

This is for init, which is recovery available, to use std::filesystem.

Bug: 126493225
Test: build pass
Change-Id: I4012f99bcfacf57e45f9f7fd04f76311c279a914
Merged-In: I4012f99bcfacf57e45f9f7fd04f76311c279a914
(cherry picked from commit 9c713b6c43bb2176f9dd1e8ec38b394ef27bf831)
diff --git a/Android.bp b/Android.bp
index f170afa..c663e7a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -148,6 +148,7 @@
 
 cc_library_static {
     name: "libc++fs",
+    recovery_available: true,
     defaults: ["libc++ defaults"],
     srcs: [
         "src/filesystem/directory_iterator.cpp",