IssueTracker

I am actually copying EXIF attributes from one image file to another image file. The code looks as follows:

```
val sourceExif = ExifInterface(sourceFilePath)
val destinationExif = ExifInterface(destinationFilePath)
exifTagsList
    .associateWith { sourceExif.getAttribute(it) }
    .forEach { (tag, value) ->
        destinationExif.setAttribute(tag, value)
    }
destinationExif.saveAttributes()
```

Where exifTagsList contains the tags I need, e.g. ExifInterface.TAG_EXPOSURE_TIME.
I'm not sure if it's okay to simply read all attributes as String and write them as String, but it worked fine for all tags, except this one.

The attribute value I get for `getAttribute(TAG_EXPOSURE_TIME)` is a String `6.25E-4`. This should be parsed correctly as double value of `0,000625`, which is equal to the actual photo exposure time of `1/1600`.

The problem here is IMO the lack of precision - for higher exposure times like 1/100, 1/50, etc. it works fine. It doesn't for smaller values like 1/1600 or 1/3200.

When you run this code, you will get 1/1666 instead of 1/1600, which I suppose is lack of precision, as 1/1666 = 0,0006:

`exifInterface.setAttribute(TAG_EXPOSURE_TIME, "6.25E-4")`

I tried `exifInterface.setAttribute(TAG_EXPOSURE_TIME, "1/1600")` but it didn't work for me. Probably the interface expects a value that it can parse as double. According to ExifInterface documentation:
> TAG_EXPOSURE_TIME
> Type is double.