Make ai.rapids.cudf.HostMemoryBuffer#copyFromStream public. (#17179)

This is the first pr of [a larger one](NVIDIA/spark-rapids-jni#2532) to introduce a new serialization format. It make `ai.rapids.cudf.HostMemoryBuffer#copyFromStream` public. For more background, see NVIDIA/spark-rapids-jni#2496

Authors:
  - Renjie Liu (https://github.com/liurenjie1024)
  - Jason Lowe (https://github.com/jlowe)

Approvers:
  - Jason Lowe (https://github.com/jlowe)
  - Alessandro Bellina (https://github.com/abellina)

URL: #17179

java/src/main/java/ai/rapids/cudf/HostMemoryBuffer.java

@@ -255,16 +255,18 @@ public final void copyFromHostBuffer(long destOffset, HostMemoryBuffer srcData,
    * @param destOffset  offset in bytes in this buffer to start copying to
    * @param in input stream to copy bytes from
    * @param byteLength number of bytes to copy
+   * @throws EOFException If there are not enough bytes in the stream to copy.
+   * @throws IOException If there is an error reading from the stream.
    */
-  final void copyFromStream(long destOffset, InputStream in, long byteLength) throws IOException {
+  public final void copyFromStream(long destOffset, InputStream in, long byteLength) throws IOException {
     addressOutOfBoundsCheck(address + destOffset, byteLength, "copy from stream");
     byte[] arrayBuffer = new byte[(int) Math.min(1024 * 128, byteLength)];
     long left = byteLength;
     while (left > 0) {
       int amountToCopy = (int) Math.min(arrayBuffer.length, left);
       int amountRead = in.read(arrayBuffer, 0, amountToCopy);
       if (amountRead < 0) {
-        throw new EOFException();
+        throw new EOFException("Unexpected end of stream, expected " + left + " more bytes");
       }
       setBytes(destOffset, arrayBuffer, 0, amountRead);
       destOffset += amountRead;