Left sig right sig match failure (uplift to 0.71.x)

[brave-builds]

Uplift of #3819
Fixes brave/brave-browser#6545

Approved, please ensure that before merging:

• You have checked CI and the builds, lint, and tests all pass or are not related to your PR.
• You have tested your change on Nightly.
• The PR milestones match the branch they are landing to.

After you merge:

• The associated issue milestone is set to the smallest version that the changes is landed on.

[bsclifton]

Manually replayed with https://ci.brave.com/job/brave-browser-build-pr/job/pr3819_issue-6545-left-sig-right-sig-match-failure_0.71.x/5/flowGraphTable/ to get past error that was happening w/ Android git cache...

[bsclifton]

Verified problem was w/ Android git cache 👍 Cancelled build as it ran into an unrelated error in create_dist for Windows and queued up a proper re-run of CI 😄

[bsclifton]

Failed on macOS only w/ https://ci.brave.com/job/brave-browser-build-pr/job/pr3819_issue-6545-left-sig-right-sig-match-failure_0.71.x/6/execution/node/455/log/

05:15:53  /Users/jenkins/jenkins/workspace/g-right-sig-match-failure_0.71.x/src/brave/chromium_src/third_party/blink/renderer/modules/encryptedmedia/navigator_request_media_key_system_access.cc:18:10: fatal error: 'brave/components/brave_drm/brave_drm.mojom.h' file not found
05:15:53  #include "brave/components/brave_drm/brave_drm.mojom.h"
05:15:53           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
05:15:53  1 error generated.

Restarted with:
https://ci.brave.com/job/brave-core-build-pr/job/PR-3896/5/console

[bsclifton]

CI shows as red - but when you view, it's actually passing. There we two xUnit test result parse errors, but ALL tests passed properly. Good to go 👍