EX: support new posthog UTD properties

[richvdh]

We previously added some extra Posthog properties to UTD reports sent by Element Web and the classic mobile apps. We need to do the same work on EX.

It looks like the new properties we need to support are:

• eventLocalAgeMillis: Not actually implemented on Web: do we need it? It's probably pretty easy so maybe we will just do it anyway.
• userTrustsOwnIdentity: presumably always true on EX
• isFederated
• isMatrixDotOrg
• wasVisibleToUser: not sure if we have this information, or if it needs to wait for a larger refactor of the UTD reporting code. Factored out to EX: support wasVisibleToUser property on UTD events sent to PostHog #2659

Already implemented:

• timeToDecryptMillis

Tasks:

• rust sdk: feat(ui): Add new properties to UnableToDecryptInfo matrix-org/matrix-rust-sdk#4360
• ffi bindings: feat(ffi): Add new properties to UnableToDecryptInfo matrix-org/matrix-rust-sdk#4404
• update kotlin wrapper: https://github.com/matrix-org/matrix-rust-components-kotlin/actions/runs/12282985162
• element-x-android: Support new properties in posthog UTD reports element-x-android#4020
• element-x-ios: Report extra UTD error properties to PostHog element-x-ios#3612

[andybalaam]

@mxandreas will follow up with @richvdh on priority of this.

[andybalaam]

@richvdh will split out wasVisibleToUser into a separate task because it is more complex than the others.

[richvdh]

@richvdh will split out wasVisibleToUser into a separate task because it is more complex than the others.

Now done: #2659