Remove obsolete media_{codec,profiles}*.xml files

These files are not used by cuttlefish; similar files from the
device/google/cuttlefish project are used instead, and those copies have
the advantage that they are branched with the platform version, which is
more appropriate. Delete these duplicates.

Bug: 124536218
Change-Id: I9b6779a6154cf27b17a97e9fbd3b49e1175ef3ec
Signed-off-by: Alistair Strachan <astrachan@google.com>