add ffmpeg mediacodec h264/h265 encode (#8028)

* Check available when app start from kotlin via get codec info
* For latency free, repeat encode 10 frame at most when capture return WouldBlock
* For changing quality, kotlin support but jni doesn't support, rerun video service when quality is manualy
  changed
* 3 or 6 times bitrate for mediacodec because its quality is poor

Signed-off-by: 21pages <pages21@163.com>

flutter/android/app/src/main/kotlin/ffi.kt

@@ -18,4 +18,5 @@ object FFI {
     external fun translateLocale(localeName: String, input: String): String
     external fun refreshScreen()
     external fun setFrameRawEnable(name: String, value: Boolean)
+    external fun setCodecInfo(info: String)
 }