start fuchsia in an emulator
usage: fx emu [-a <mode>] [-c <text>] [-N [-I <ifname>]] [-u <path>] [-g <port> [-r <fps>] [-t <cmd>]] [-x <port> [-X <directory>]] [-e <directory>] [-w <size>] [-s <cpus>] [-k <authorized_keys_file>] [--audio] [--headless] [--software-gpu] [--debugger]
-a <mode> acceleration mode (auto, off, kvm, hvf, hax), default is auto
-c <text> add item to kernel command line
-ds <size> extends the fvm image size to <size> bytes. Default is twice the original size
-N run with emulated nic via tun/tap
-I <ifname> uses the tun/tap interface named ifname
-u <path> execute aemu if-up script, default is no script
-e <directory> location of emulator, defaults to looking in prebuilt/third_party/aemu/PLATFORM
-g <port> enable gRPC service on port to control the emulator, default is 5556 when WebRTC service is enabled
-r <fps> webrtc frame rate when using gRPC service, default is 30
-t <cmd> execute the given command to obtain turn configuration
-x <port> enable WebRTC HTTP service on port
-X <directory> location of grpcwebproxy, defaults to looking in prebuilt/third_party/grpcwebproxy
-w <size> window size, default is 1280x800
-s <cpus> number of cpus, 1 for uniprocessor, default is 4
-k <authorized_keys_file> SSH authorized keys file, otherwise defaults to //.ssh/authorized_keys
--audio run with audio hardware added to the virtual machine
--headless run in headless mode
--software-gpu run without host GPU acceleration
--debugger pause on launch and wait for a debugger process to attach before resuming