Add domain_deprecated to bluetooth domains in 26.0.

domain_deprecated is a private attribute, which means that none of
its rules will be copied to vendor policy.  Unfortunately, this
means that any public type that used the attribute now loses policy
rules on which a vendor may have been relying unknowingly.  Add the
domain back in the compatiblity file so that O vendor policy remains
sufficient.

Bug: 62573845
Test: None, prebuilt change and prebuilt tests not in yet.
Change-Id: I2c4ce00ecb102f087472e183fa52d072fe6eb398