Add more NetEq information to NetEqState.

Some important NetEq information was not available in NetEqState, which
meant it was not available on the API. This CL adds additional
information.

Bug: webrtc:9667
Change-Id: I702707c7d60472f488047d48fb286f839c5608dc
Reviewed-on: https://webrtc-review.googlesource.com/c/102300
Reviewed-by: Minyue Li <minyue@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Ivo Creusen <ivoc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24985}

modules/audio_coding/neteq/neteq_impl.cc

@@ -378,6 +378,10 @@ NetEqOperationsAndState NetEqImpl::GetOperationsAndState() const {
       (packet_buffer_->NumSamplesInBuffer(decoder_frame_length_) +
        sync_buffer_->FutureLength()) *
       1000 / fs_hz_;
+  result.current_frame_size_ms = decoder_frame_length_ * 1000 / fs_hz_;
+  result.next_packet_available = packet_buffer_->PeekNextPacket() &&
+                                 packet_buffer_->PeekNextPacket()->timestamp ==
+                                     sync_buffer_->end_timestamp();
   return result;
 }