Modify the media_profiles.xsd

On some devices, ImageEncoding and ImageDecoding tags are used in any
order. And parser in libmedia library can support it.
So xsd file is modified for supporting any orther.

Bug: 132049541
Test: make -j40 vts
Test: vts-tradefed run vts -m VtsValidateMediaProfiles

Change-Id: Ib32cfcce82fc72294533905c29227f6e443aa7d6