Add wrapped key support for metadata encryption

Change metadata_cipher fstab option to metadata_encryption
that includes encryption flags in addition to the cipher.
wrappedkey_v0 encryption flag is used to denote that the
inline encryption hardware supports wrapped keys. dm-default-key
device is created and a wrappedkey is provided along with the
optional wrappedkey_v0 argument.

Bug: 147733587

Test: FBE validation with Fscrypt v2 + inline crypt + wrapped
key changes kernel and metadata encryption with wrapped key.

Change-Id: Id1a18db175680dd6b0adb4594d06566eb1285785