Java: Fix byte GlideString conversion to String bug

[GumpacG]

Description

Fixes a bug that incorrectly converts non UTF-8 bytes GlideString to String with the value "Value not convertible to string: byte[] " instead of throwing an exception.

Affected APIs:

convertMapToKeyValueGlideStringArray:

• public CompletableFuture<String> msetBinary(@NonNull Map<GlideString, GlideString> keyValueMap)
• public CompletableFuture<Long> hset( @NonNull GlideString key, @NonNull Map<GlideString, GlideString> fieldValueMap)
• public CompletableFuture<GlideString> xadd( @NonNull GlideString key, @NonNull Map<GlideString, GlideString> values, @NonNull StreamAddOptionsBinary options)
• public CompletableFuture<Boolean> msetnxBinary( @NonNull Map<GlideString, GlideString> keyValueMap)

convertNestedArrayToKeyValueGlideStringArray:

• public CompletableFuture<GlideString> xadd( @NonNull GlideString key, @NonNull GlideString[][] values, @NonNull StreamAddOptionsBinary options)

convertMapToValueKeyStringArrayBinary:

• public CompletableFuture<Long> zadd( @NonNull GlideString key, @NonNull Map<GlideString, Double> membersScoresMap, @NonNull ZAddOptions options, boolean changed)

Reproduction steps for the bug:

Run

        byte[] nonUTF8Bytes = new byte[] {(byte) 0xEE};
        GlideString hashKey = gs(UUID.randomUUID().toString());
        GlideString value = gs(nonUTF8Bytes);
        String stringField = "field";
        Map<GlideString, GlideString> fieldValueMap = Map.of(gs(stringField), value);

        assertEquals(1, client.hset(hashKey, fieldValueMap).get());
        System.out.println(client.hget(hashKey.toString(), stringField).get());

See the output to be Value not convertible to string: byte[] 13

Expected

We expect an exception to be thrown in order to avoid unintended data to be stored in the server.

[Yury-Fridlyand]

Please list which APIs (commands) you fixed in the PR description