Fix builders ABI backward compatibility broken in v1.33.0

[sergiitk]

What's this PR do?

Brings back io.grpc.internal.AbstractManagedChannelImplBuilder and io.grpc.internal.AbstractServerImplBuilder to the class hierarchy to fix broken ABI backward compatibility.

Any background context you want to provide?

AbstractManagedChannelImplBuilder

AbstractManagedChannelImplBuilder brought back as a copy of ForwardingChannelBuilder support pre-v1.33 binary interface, e.g. io.grpc.netty.NettyChannelBuilder.maxInboundMessageSize(I)Lio/grpc/internal/AbstractManagedChannelImplBuilder;

AbstractServerImplBuilder

• Brings back io.grpc.internal.AbstractManagedChannelImplBuilder and io.grpc.internal.AbstractServerImplBuilder to the class hierarchy to fix broken ABI backward compatibility.
• Since ForwardingServerBuilder was introduced in v1.33.0, I changed it to ForwardingServerBuilder<T extends ServerBuilder<T>>. and made it package-private.

What are the relevant tickets?

• Fixes Binary backwards-incompatibily in 1.33.0 #7552
• Partially undoes Hide AbstractManagedChannelImplBuilder from public API #7211

[ejona86]

@sergiitk, did you push your changes?

[sergiitk]

@ejona86 on it

[sergiitk]

Confirming the latest change fixes server builders ABI.

❯ java -cp "./abi-1.32.2.jar:./deps-1.32.2/*" org.example.AbiServer ServerImpl{logId=2, transportServers=[NettyServer{logId=1, address=0.0.0.0/0.0.0.0:10000}]} ❯ java -cp "./abi-1.32.2.jar:./deps-1.33.0/*" org.example.AbiServer Exception in thread "main" java.lang.NoSuchMethodError: io.grpc.netty.NettyServerBuilder.handshakeTimeout(JLjava/util/concurrent/TimeUnit;)Lio/grpc/internal/AbstractServerImplBuilder;	at org.example.AbiServer.<init>(AbiServer.java:15)	at org.example.AbiServer.main(AbiServer.java:23) ❯ java -cp "./abi-1.32.2.jar:./deps-1.34-7eac3b0/*" org.example.AbiServer ServerImpl{logId=2, transportServers=[NettyServer{logId=1, address=0.0.0.0/0.0.0.0:10000}]}

src:

package org.example; import java.util.concurrent.TimeUnit; import io.grpc.Server; import io.grpc.ServerBuilder; import io.grpc.netty.NettyServerBuilder; public class AbiServer { private final NettyServerBuilder nsb; public AbiServer() { nsb = NettyServerBuilder .forPort(10_000) .initialFlowControlWindow(100) // own in 1.32.2 .handshakeTimeout(Long.MAX_VALUE, TimeUnit.SECONDS); // moved from abstract to fwd in v1.33.0 } public ServerBuilder getBuilder() { return nsb; } public static void main(String[] args) { AbiServer me = new AbiServer(); Server s = me.getBuilder().build(); System.out.println(s); } }