Update the bug that's blocking libc++fs for vendor code. am: bb48d640b3 am: 218012a3aa am: d52c2703e3

Original change: https://android-review.googlesource.com/c/platform/external/libcxx/+/1792712

Change-Id: I9f51185128f8b5e6a41a2fa7d39860828b9407e4