Samples snippet InsertingDataTypes.java is writing byte array to `ARRAY<BYTES>` instead of `BYTES`

[forksumit]

Samples snippet : https://github.com/googleapis/java-bigquery/blob/main/samples/snippets/src/main/java/com/example/bigquery/InsertingDataTypes.java is writing a byte array to ARRAY<BYTES> column in bigquery (BYTES in REPEATED mode) which gets stored as multiple byte arrays in BigQuery and becomes unserializable on reading.

Currently

• BigQuery java client doesn't support directly writing byte array to BYTES datatype in bigquery, but converting that byte array to base64 string and then writing via client works smoothly
• BigQuery java client currently supports writing byte array to ARRAY<BYTES> which should not supported