[maven-release-plugin] prepare for next development iteration
Add VideoTx class source in Android.mk to compile.
Do not compile video-tx.c.
Change media-tx.c by MediaTx.cpp.
Add utils.c.

It has a function to convert from java VideoCodecType Enum to enumCodecID.
Receive a VideoCodecType obj in init_video.

Use get_CodecID_from_VideoCodecTypeEnum to obtain the enum CodecID.
Format utils.h.
Add AudioTx.cpp in Android.mk.
Do not compile audio-tx.c.
Use AudioTx obj instead of audio-tx.
Add get_CodecID_from_AudioCodecTypeEnum function.
Receive a AudioCodecType obj in init_audio.
Change media-rx.c by MediaRx.cpp.
Format MediaRx.cpp and MediaTx.cpp.
Compile MediaRx class.
Add JNI in jni files.
Use JNIMediaPortManager.cpp instead of media-port-manager.c
Delete old media sources compilation and use only new media-oo.
Format Android.mk.
Clean source code.