Bug 1897501 - Vendor libwebrtc from 06986dc187

Upstream commit: https://webrtc.googlesource.com/src/+/06986dc187465997549eafc164f2d0c3323284c6
    Add flag to exclude policy exempt field trials when listing expired ones

    This is a new version of 47cfed2a7d ("Add flag to exclude policy exempt
    field trials when listing expired ones") that was reverted because the
    CI didn't use a hermetic version of Python. This version relies on older
    Python constructs so it can be used by the CI.

    Bug: None
    Change-Id: I3b4794242d48c59ad94c6210c774cced362fc279
    Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/346600
    Reviewed-by: Jeremy Leconte <jlecontegoogle.com>
    Commit-Queue: Emil Lundmark <lndmrkwebrtc.org>
    Cr-Commit-Position: refs/heads/main{#42029}

UltraBlame original commit: 6b6920c1e4a268fdad3f1989d375eef34e0034bc

third_party/libwebrtc/README.moz-ff-commit

@@ -465054,3 +465054,52 @@ of
 lastest
 vendoring
 d5c107d5d4
+#
+MOZ_LIBWEBRTC_SRC
+=
+/
+home
+/
+mfroman
+/
+mozilla
+/
+moz
+-
+central
+/
+.
+moz
+-
+fast
+-
+forward
+/
+moz
+-
+libwebrtc
+MOZ_LIBWEBRTC_BRANCH
+=
+mozpatches
+bash
+dom
+/
+media
+/
+webrtc
+/
+third_party_build
+/
+fast
+-
+forward
+-
+libwebrtc
+.
+sh
+#
+base
+of
+lastest
+vendoring
+06986dc187

third_party/libwebrtc/README.mozilla

@@ -769112,3 +769112,91 @@ on
 .
 602951
 .
+#
+.
+/
+mach
+python
+dom
+/
+media
+/
+webrtc
+/
+third_party_build
+/
+vendor
+-
+libwebrtc
+.
+py
+-
+-
+from
+-
+local
+/
+home
+/
+mfroman
+/
+mozilla
+/
+moz
+-
+central
+/
+.
+moz
+-
+fast
+-
+forward
+/
+moz
+-
+libwebrtc
+-
+-
+commit
+mozpatches
+libwebrtc
+libwebrtc
+updated
+from
+/
+home
+/
+mfroman
+/
+mozilla
+/
+moz
+-
+central
+/
+.
+moz
+-
+fast
+-
+forward
+/
+moz
+-
+libwebrtc
+commit
+mozpatches
+on
+2024
+-
+05
+-
+18T03
+:
+42
+:
+03
+.
+316923
+.

third_party/libwebrtc/experiments/field_trials.py

@@ -7000,9 +7000,18 @@
 =
 expired_field_trials
 (
+
 today
 +
 diff
+
+ACTIVE_FIELD_TRIALS
+if
+args
+.
+no_exempt
+else
+REGISTERED_FIELD_TRIALS
 )
 
 if
@@ -7332,6 +7341,46 @@
 add_argument
 (
 
+'
+-
+-
+no
+-
+exempt
+'
+
+default
+=
+False
+
+action
+=
+'
+store_true
+'
+
+required
+=
+False
+
+help
+=
+'
+whether
+to
+include
+policy
+exempt
+field
+trials
+'
+)
+
+parser_expired
+.
+add_argument
+(
+
 '
 -
 -