device-fsl

MA-14586[Android] prefer to use mdpi for evk-7ulp and sabresd-7d

When display screen size is too small, such as sabresd-7d(480x272) and
evk-7ulp(640x480), some images in recovery resource cannot caculate the
right display position. So the image cannot show in the screen. There is
no "loop" UI when do factory reset.
As the display screen size is too small, use mdpi as preferred resource
when copy recovery image resources.

Change-Id: I9eb7ba6128e3e203d8e5c196d7be09ad310933ad
Signed-off-by: Zhang Bo <bo.zhang@nxp.com>
Reviewed-on: http://androidsource.ap.freescale.net/project/8128
Reviewed-by: zhang sanshan <sanshan.zhang@nxp.com>