Add PeerConnection.Options to Device.load()

[skgwazap]

I'm not a C++ dev at all, so it's just a monkey copy-pasting some code from JNI_Device_CreateSendTransport to JNI_Device_Load.

What was done:

• Added options parameter to Device.load(String routerRtpCapabilities, PeerConnection.Options options)
• Updated Device.nativeLoad
• Updated jni headers with jni-generator.sh
• Updated JNI_Device_Load in device_jni.cpp
• Fixed tests

Why was it done? To fix the issue #12, the problem is with multiple instances of PeerConnectionFactory created by mediasoup-client internally. So, applications must provide a shared instance using options in Device.load Device.createSendTransport and Device.createRecvTransport

final String routerRtpCapabilities = mProtoo.syncRequest("getRouterRtpCapabilities");
final PeerConnection.Options options = new PeerConnection.Options();
options.setFactory(mPeerConnectionUtils.getSharedPeerConnectionFactory(mContext));
mMediasoupDevice = new Device();
mMediasoupDevice.load(routerRtpCapabilities, options);

[haiyangwu]

LGTM, thx @yinbiaos @skgwazap

btw, the project will be restarted.