[NextPluggableDevice]add pjrt compile on demand control flag 
@jyingl3  can you have a review? thanks Hi Zhoulong, sorry just realize one issue - could you update the build target of tensorflow/core/common_runtime/pluggable_device/pluggable_device_plugin_init.cc to include pjrt_compile_on_demand_op? Thank you! > Hi Zhoulong, sorry just realize one issue - could you update the build target of tensorflow/core/common_runtime/pluggable_device/pluggable_device_plugin_init.cc to include pjrt_compile_on_demand_op? Thank you!

@jyingl3 done. thanks
let eager op compiled by xla or execute on custom kernel control to plugin