ANDROID: dm table: propagate inline encryption flag to dm devices

If all targets in a device-mapper table support inline encryption, mark
the mapped device as supporting inline encryption.  This will allow
filesystems such as ext4 to tell whether the hardware supports inline
encryption even in the case where there is an intervening dm device.

Change-Id: Ic83203f8cc8d440d50fefac62d7849ce035c657a
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Shivaprasad Hongal <shongal@codeaurora.org>
Signed-off-by: Barani Muthukumaran <bmuthuku@codeaurora.org>