Update `early_execute_margin` after process packets, and the test case.
Original change's description:
>Pacer: Reduce TQ wake up and improve packet size estimation
>
>The TQ Pacer schedules delayed task according to target time of
>PacingController. It drains all valid ProcessPackets() in single loop,
>denies retired scheduled tasks, and round up the timeout to 1ms.
>
>This CL also improves packet size estimation in TQ Pacer by removing
>zero initialization, and introduces `include_overhead_` configuration.
>
>Tests:
>1. webrtc_perf_tests: MaybeProcessPackets() calls
> 2075147 -> 2007995
>
>2. module_unittests: MaybeProcessPackets() calls
> 203393 -> 183563
>
>3. peerconnection_unittests: MaybeProcessPackets() calls
> 66713-> 64333
>
>Bug: webrtc:13417, webrtc:13437
>Change-Id: I18eb0a36dbe063c606b1f27014df74a65ebfc486
>Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/242962
>Reviewed-by: Erik Språng <sprang@webrtc.org>
>Reviewed-by: Henrik Boström <hbos@webrtc.org>
>Commit-Queue: Erik Språng <sprang@webrtc.org>
>Cr-Commit-Position: refs/heads/main@{#36179}
Bug: webrtc:13417, webrtc:13437
Change-Id: I79f2554cf02364b67ce7073698611a3ae337a73b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/256145
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Owners-Override: Erik Språng <sprang@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#36283}
df59e53818