static boolean isContentType(String contentMimeType, Uri uri, Context context) {
        final String mimeType = getMimeType(uri, context);

        if (mimeType != null) {
            return mimeType.contains(contentMimeType);
        }

        return false;
    }
Verifies the content typs of a file URI. A helper function
for isVideoType and isImageType

@param contentMimeType - "video/" or "image/"
@param uri             - file uri
@param context         - react context
@return a boolean to determine if file is of specified content type i.e. image or video
android/src/main/java/com/imagepicker/Utils.java