change uaProf url again

modified the nexus 5 uaProf to match the Nexus 4. Some modifications came from the E970 uaProf.

This will hopefully tell carrier's servers the correct mms abilities.

Nexus 5 uaProf:
http://gsm.lge.com/html/gsm/Nexus5-M20.xml

E970 uaProf:
http://gsm.lge.com/html/gsm/E970-M6-D1.xml