ANDROID: update "fscrypt: add support for hardware-wrapped keys" to v7

The hardware-wrapped key support in this branch is based on my patch
"[RFC PATCH v3 3/3] fscrypt: add support for hardware-wrapped keys"
(https://lore.kernel.org/r/20211021181608.54127-4-ebiggers@kernel.org)
I've since made several updates to that patch and it is now at v7.

This commit brings in the updates from v3 to v7, to the extent possible
while retaining compatibility with the UAPI and on-disk format used for
this feature in Android.  This mainly includes some improved log
messages, and compatibility with the blk-crypto updates.

Bug: 160883801
Link: https://lore.kernel.org/all/20221216203636.81491-5-ebiggers@kernel.org


Change-Id: I1c43ca55ec7e95dd06f8f7944100ffd14771d3a7
Signed-off-by: Eric Biggers <ebiggers@google.com>