void printChunk(int logLevel, String tag, String msg) {
    android.util.Log.println(logLevel, tag, msg);
  }
Print single chunk of log in new line.

@param logLevel the level of log
@param tag      the tag of log
@param msg      the msg of log
xlog/src/main/java/com/elvishew/xlog/printer/AndroidPrinter.java