JavaClient: Encode Packed Booleans Instead of Reinterpretted Bytes

[nbauernfeind]

Fixes #3799.
Fixes #1373.

[devinrsmith]

May be worthwhil to try and fix #1373, here is the commented out code updated from io.deephaven.client.DeephavenFlightSessionTest:

    // TODO (deephaven-core#1373): Hook up doPut integration unit testing
    @Test
    public void doPutStream() throws Exception {
        try (
                final TableHandle ten = flightSession.session().execute(TableSpec.empty(10).view("I=i"));
                // DoGet
                final FlightStream tenStream = flightSession.stream(ten);
                // DoPut
                final TableHandle tenAgain = flightSession.putExport(tenStream)) {
            assertThat(tenAgain.response().getSchemaHeader()).isEqualTo(ten.response().getSchemaHeader());
        }
    }

     @Test
     public void doPutNewTable() throws TableHandleException, InterruptedException {
         try (final TableHandle newTableHandle = flightSession.putExport(newTable(), bufferAllocator)) {
            // ignore
         }
     }

It appears the flight client is blocking on getResult; it may be a factor that this is an in-process setup?

java.lang.Thread.State: WAITING
     at jdk.internal.misc.Unsafe.park(Unsafe.java:-1)
     at java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
     at java.util.concurrent.CompletableFuture$Signaller.block(CompletableFuture.java:1796)
     at java.util.concurrent.ForkJoinPool.managedBlock(ForkJoinPool.java:3128)
     at java.util.concurrent.CompletableFuture.waitingGet(CompletableFuture.java:1823)
     at java.util.concurrent.CompletableFuture.get(CompletableFuture.java:1998)
     at org.apache.arrow.flight.AsyncPutListener.getResult(AsyncPutListener.java:46)
     at org.apache.arrow.flight.FlightClient$$Lambda$788.1823014131.run(Unknown Source:-1)
     at org.apache.arrow.flight.FlightClient$PutObserver.getResult(FlightClient.java:491)
     at io.deephaven.client.impl.FlightClientHelper.put(FlightClientHelper.java:51)
     at io.deephaven.client.impl.FlightClientHelper.put(FlightClientHelper.java:29)
     at io.deephaven.client.impl.FlightSession.put(FlightSession.java:198)
     at io.deephaven.client.impl.FlightSession.putExportManual(FlightSession.java:183)
     at io.deephaven.client.impl.FlightSession.putExport(FlightSession.java:135)
     at io.deephaven.client.DeephavenFlightSessionTest.doPutStream(DeephavenFlightSessionTest.java:93)

[devinrsmith]

All looks good to me. Looks like spotless in complaining. We probably want to push this through nightlies?

[devinrsmith]

Not sure exactly the pattern we are supposed to be using - will defer to @rcaudy