hlte: Enable compressed VoIP

Change-Id: I15edc077b3be10a91bad6dd685a56b4b833ef8bb
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_samsung_hlte into cm-11.0
Merge remote-tracking branch 'temasek/cm-11.0' into cm-11.0