Incoming session verification

[bmarty]

Here is a quick demo of the feature:

• Element Web at top left, requesting the verification.
• Bottom left, another instance of Element Web, with a verified session
• On the right, EXA running the code from this PR

https://github.com/user-attachments/assets/58a23b56-4016-4c02-8bd2-d465182bfc8b

[github-actions[bot]]

:iphone: Scan the QR code below to install the build (arm64 only) for this PR. If you can't scan the QR code you can install the build via this link: https://i.diawi.com/HzXNig

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 90.00000% with 62 lines in your changes missing coverage. Please review.

Project coverage is 83.09%. Comparing base (e329370) to head (f03a432). Report is 16 commits behind head on develop.

Files with missing lines	Patch %	Lines
.../impl/incoming/IncomingVerificationStateMachine.kt	74.28%	16 Missing and 2 partials :warning:
...ion/impl/incoming/IncomingVerificationPresenter.kt	85.71%	5 Missing and 7 partials :warning:
...rifysession/impl/outgoing/VerifySelfSessionView.kt	79.66%	0 Missing and 12 partials :warning:
.../incoming/DefaultIncomingVerificationEntryPoint.kt	0.00%	8 Missing :warning:
...erifysession/api/IncomingVerificationEntryPoint.kt	0.00%	2 Missing :warning:
...atures/verifysession/impl/util/StateMachineUtil.kt	66.66%	2 Missing :warning:
.../verification/SessionVerificationRequestDetails.kt	75.00%	2 Missing :warning:
...est/verification/FakeSessionVerificationService.kt	90.90%	2 Missing :warning:
...ession/impl/outgoing/VerifySelfSessionPresenter.kt	96.77%	0 Missing and 1 partial :warning:
...es/verifysession/impl/ui/VerificationBottomMenu.kt	85.71%	1 Missing :warning:
... and 2 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #3733 +/- ## =========================================== + Coverage 83.05% 83.09% +0.04% =========================================== Files 1754 1770 +16 Lines 43994 44378 +384 Branches 5142 5202 +60 =========================================== + Hits 36539 36878 +339 - Misses 5632 5669 +37 - Partials 1823 1831 +8 ```

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[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud