Merge M93: Condition frame pacing on min/max playout delay

As a first step we only want to enable frame pacing for the case
where min playout delay == 0 and max playout delay > 0.

(cherry picked from commit b2745ba)

Bug: chromium:1237402, chromium:1239469
Change-Id: Icf9641db7566083d0279135efa8618e435d881eb
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/228640
Commit-Queue: Johannes Kron <[email protected]>
Reviewed-by: Ilya Nikolaevskiy <[email protected]>
Cr-Original-Commit-Position: refs/heads/master@{#34752}
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/229021
Cr-Commit-Position: refs/branch-heads/4577@{#7}
Cr-Branched-From: 5196931-refs/heads/master@{#34463}

Author: Johannes Kron

modules/video_coding/timing.cc

@@ -214,7 +214,8 @@ int64_t VCMTiming::MaxWaitingTime(int64_t render_time_ms,
                                   bool too_many_frames_queued) const {
   MutexLock lock(&mutex_);
 
-  if (render_time_ms == 0 && zero_playout_delay_min_pacing_->us() > 0) {
+  if (render_time_ms == 0 && zero_playout_delay_min_pacing_->us() > 0 &&
+      min_playout_delay_ms_ == 0 && max_playout_delay_ms_ > 0) {
     // |render_time_ms| == 0 indicates that the frame should be decoded and
     // rendered as soon as possible. However, the decoder can be choked if too
     // many frames are sent at once. Therefore, limit the interframe delay to