test: improve app 'session-created' event spec

[trop]

Backport of #25799. Depends on #25798

See that PR for details.

Notes: no-notes

[codebytere]

@miniak this appears to need some work

[ckerr]

Agree w/ @codebytere, these test fails appear to be related to the patch:

TypeError: Illegal invocation: Function must be called on an object of type Session
    at formatProperty (electron/node_modules/chai/lib/chai/utils/inspect.js:294:31)
    at /home/builduser/project/src/electron/node_modules/chai/lib/chai/utils/inspect.js:190:14
    at Array.map (<anonymous>)
    at formatValue (electron/node_modules/chai/lib/chai/utils/inspect.js:189:19)
    at inspect (electron/node_modules/chai/lib/chai/utils/inspect.js:32:10)
    at objDisplay (electron/node_modules/chai/lib/chai/utils/objDisplay.js:28:13)
    at /home/builduser/project/src/electron/node_modules/chai/lib/chai/utils/getMessage.js:47:48
    at String.replace (<anonymous>)
    at Object.getMessage (electron/node_modules/chai/lib/chai/utils/getMessage.js:47:6)
    at Proxy.Assertion.assert (electron/node_modules/chai/lib/chai/assertion.js:139:18)

Likely there's some difference between the tests in master and here?

[miniak]

@codebytere, @ckerr this is expected, it's catching a problem #25798 is fixing and that needs to be merged first

[miniak]

@codebytere, @ckerr rebased this PR, the test is now passing

[codebytere]

chrome extensions does not crash when using chrome.management

is unrelated

[release-clerk]

No Release Notes