* [Backend] fix lite backend save model error
* [Backend] fixed typos
* [FlyCV] optimize the integration of FlyCV
* [cmake] close some tests options
* [cmake] close some test option
* [FlyCV] remove un-need warnings
* [FlyCV] remove un-need GetMat method
* [FlyCV] optimize FlyCV codes
* [cmake] remove un-need cmake function in examples/CMakelists
* [cmake] support gflags for Android