ANDROID: GKI: set more vfs-only exports into their own namespace

There are more vfs-only symbols that OEMs want to use, so place them in
the proper vfs-only namespace.

Bug: 157965270
Bug: 210074446
Bug: 227656251
Cc: Matthias Maennich <maennich@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I99b9facc8da45fb329f6627d204180d1f89bcf97