FileUtils.getExternalFilesDir WRITE_EXTERNAL_PERMISSION

[xdeop]

FileUtils.getExternalFilesDir shouldn't require the WRITE_EXTERNAL_PERMISSION as this permissions is not needed for Context.getExternalFilesDir

https://developer.android.com/reference/android/content/Context#getExternalFilesDir(java.lang.String)

It should match the current implementation of FileUtils.getExternalCacheDir(getContext());