OMTP client type null improvement - cp aosp/319963 into Dialer

Replace the null "client type" value by a more detailed value in the MO SMS.
Create a client type value based on :
- Manufacturer name
- Model name
- Android os version

Test: OmtpConstantsTest.java

Original author:
http://aosp/319963 - Alexis MARCOU <alexis.marcou@orange.com>

PiperOrigin-RevId: 159906976
Change-Id: If759f7c96c9fb9a3895f8d944c842c350b8d2472