Add delay manager config options.

Add a new field trial with more flexible parsing and new options:
- Resample packet delays to only update histogram with maximum observed
 delay every X ms.
- Setting the maximum history size (in ms) used for calculating the
 relative arrival delay.

Legacy field trial used for configuration is maintained.

Bug: webrtc:10333
Change-Id: I35b004f5d8209c85b33cb49def3816db51650946
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/192789
Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32591}

modules/audio_coding/neteq/decision_logic_unittest.cc

@@ -64,7 +64,8 @@ class DecisionLogicTest : public ::testing::Test {
     std::unique_ptr<Histogram> histogram =
         std::make_unique<Histogram>(200, 12345, 2);
     auto delay_manager = std::make_unique<MockDelayManager>(
-        200, 0, 12300, config.tick_timer, std::move(histogram));
+        200, 0, 12300, absl::nullopt, 2000, config.tick_timer,
+        std::move(histogram));
     mock_delay_manager_ = delay_manager.get();
     auto buffer_level_filter = std::make_unique<MockBufferLevelFilter>();
     mock_buffer_level_filter_ = buffer_level_filter.get();