Roll BoringSSL from dec5ee1f0108 to 4d969991f617 (7 revisions)

https://boringssl.googlesource.com/boringssl.git/+log/dec5ee1f0108..4d969991f617

2026-03-19 chlily@google.com GitHub: Loosen branch-time.yml check
2026-03-19 chlily@google.com Add a function to copy the public part of an EVP_PKEY
2026-03-18 xfding@google.com rust: Move test data around for incoming crates
2026-03-17 rpolzer@google.com Array::CopyFrom and InPlaceVector::TryCopyFrom: do not allow in to alias this.
2026-03-17 rpolzer@google.com Document that BIO flags should usually be left alone.
2026-03-17 davidben@google.com Add RFC 9525 to references
2026-03-17 chlily@google.com Const-correct EVP_PKEY_CTX_set1_signature_context_string

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/boringssl-dart-sdk
Please CC dart-engprod@google.com,dart-vm-gardener@rotations.google.com,dart-vm-team@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in BoringSSL: https://crbug.com/boringssl/new
To file a bug in Dart SDK: https://github.com/dart-lang/sdk/issues

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Tbr: dart-vm-gardener@rotations.google.com
Change-Id: I1038c6eb93585ab8a2932145deef28bcf45e830f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/489123
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>

DEPS

@@ -102,7 +102,7 @@ vars = {
 
   # Prefer to use hashes of binaryen that have been reviewed & rolled into g3.
   "binaryen_rev" : "204c3f88bb2e2c92b103b0cfbf4e0a4863c12c87",
-  "boringssl_rev": "dec5ee1f0108484e83409805ee570021c13b225c",
+  "boringssl_rev": "4d969991f61733b4cab1ae871b136fd4dd6c6005",
   "browser-compat-data_tag": "ac8cae697014da1ff7124fba33b0b4245cc6cd1b", # v1.0.22
   "cpu_features_rev": "936b9ab5515dead115606559502e3864958f7f6e",
   "devtools_rev": "45869157ee784ea4cb78570a5ba41da56a528673",