v2/handler: stub in call frame fragment handling
v2/handler: stub in call frame fragment handling

savaki/tchannel,benfleis/tchannel,chenwenbin928/tchannel,savaki/tchannel,i/tchannel,bunnyblue/tchannel,savaki/tchannel,sasa233/tchannel,RyanTech/tchannel,bunnyblue/tchannel,hustxiaoc/tchannel,Zirpon/tchannel,benfleis/tchannel,i/tchannel,vanloswang/tchannel,vanloswang/tchannel,benfleis/tchannel,hustxiaoc/tchannel,sasa233/tchannel,RyanTech/tchannel,vanloswang/tchannel,hustxiaoc/tchannel,Zirpon/tchannel,chenwenbin928/tchannel,RyanTech/tchannel,sasa233/tchannel,Zirpon/tchannel,chenwenbin928/tchannel,i/tchannel,bunnyblue/tchannel