Settings(MSIM): Add TuneAway and PrioritySub to MultiSimSettings

1. Add support for TuneAway and PrioritySub UI options in
MultiSimSettings
2. Add setDefaultVoiceSub, setTuneAway and setPrioritySub
OEM HOOK requests in OSS space

Change-Id: I3b1bc4ed98b3ed7b280938878ba9d7bdb244fcf9
CRs-fixed: 464483

Conflicts:
	res/values/strings.xml
	res/xml/multi_sim_settings.xml
	src/com/android/settings/MultiSimSettings.java