Restore sdcardfs feature

4da740c1 Revert "ANDROID: fscrypt: add key removal notifier chain"
9b733ddb Revert "ANDROID: sdcardfs: Enable modular sdcardfs"
3b7ef788 Revert "ANDROID: vfs: Add setattr2 for filesystems with per mount permissions"
7df42051 Revert "ANDROID: vfs: fix export symbol type"
633920f3 Revert "ANDROID: vfs: Add permission2 for filesystems with per mount permissions"
d60170f9 Revert "ANDROID: vfs: fix export symbol types"
fc411cf9 Revert "ANDROID: vfs: add d_canonical_path for stacked filesystem support"
0fb8b79a Revert "ANDROID: fs: Restore vfs_path_lookup() export"
7d8d1281 ANDROID: sdcardfs: remove sdcardfs from system`

Change-Id: I675db7148a6a349d1ed630b506f26e77f55924cd
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>