Delete frameworks/base/voip use voip-common from frameworks/opt/net/voip

Android.mk

CleanSpec.mk

voip/java/android/net/rtp/AudioCodec.java

voip/java/android/net/rtp/AudioGroup.java

voip/java/android/net/rtp/AudioStream.java

voip/java/android/net/rtp/RtpStream.java

voip/java/android/net/rtp/package.html

voip/java/android/net/sip/ISipService.aidl

voip/java/android/net/sip/ISipSession.aidl

voip/java/android/net/sip/ISipSessionListener.aidl

voip/java/android/net/sip/SimpleSessionDescription.java

voip/java/android/net/sip/SipAudioCall.java

voip/java/android/net/sip/SipErrorCode.java

voip/java/android/net/sip/SipException.java

voip/java/android/net/sip/SipManager.java

voip/java/android/net/sip/SipProfile.aidl

voip/java/android/net/sip/SipProfile.java

voip/java/android/net/sip/SipRegistrationListener.java

voip/java/android/net/sip/SipSession.java

voip/java/android/net/sip/SipSessionAdapter.java