Reland of VCMCodecTimer: Change filter from max to 95th percentile (patchset #1 id:1 of https://codereview.webrtc.org/1808693002/ )

This CL is expected to lower goog_max_decode_ms and total_delay_incl_network/receiver_time for screenshare.

Reason for revert:
This CL did not cause the unexpected goog_encode_usage_percent and goog_avg_encode_ms perf changes.

Original issue's description:
> Revert of VCMCodecTimer: Change filter from max to 95th percentile (patchset #5 id:180001 of https://codereview.webrtc.org/1742323002/ )
>
> Reason for revert:
> Caused unexpected perf stats changes, see http://crbug/594575.
>
> Original issue's description:
> > VCMCodecTimer: Change filter from max to 95th percentile
> >
> > The purpose with this change is to make the filter more robust against anomalies. googMaxDecodeMs is expected to drop a litte by this.
> >
> > BUG=b/27306053
> >
> > Committed: https://crrev.com/4bf0c717740d1834e810ea5f32b3c4306c64235f
> > Cr-Commit-Position: refs/heads/master@{#11952}
>
> TBR=stefan@webrtc.org,philipel@webrtc.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=594575,b/27306053
>
> Committed: https://crrev.com/c4a74e95b545f4752d4e72961ac03c1380d4bc1f
> Cr-Commit-Position: refs/heads/master@{#12018}

TBR=stefan@webrtc.org,philipel@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=594575,b/27306053

Review URL: https://codereview.webrtc.org/1824763003

Cr-Commit-Position: refs/heads/master@{#12087}

webrtc/modules/video_coding/video_coding.gypi

@@ -47,6 +47,7 @@
         'nack_fec_tables.h',
         'nack_module.h',
         'packet.h',
+        'percentile_filter.h',
         'qm_select_data.h',
         'qm_select.h',
         'receiver.h',
@@ -74,6 +75,7 @@
         'media_optimization.cc',
         'nack_module.cc',
         'packet.cc',
+        'percentile_filter.cc',
         'qm_select.cc',
         'receiver.cc',
         'rtt_filter.cc',