Document application ID schema as it is used for telemetry purposes

[grigoryk]

What

Documents structure of the application ID as it used used for telemetry purposes. Reference doc: https://microsoft.sharepoint-df.com/:w:/t/IC3SDK/EWNs0SbsX4dFhHCZ7-GylBgBE_GHlZIl7czpCwNlfrk5Mg?e=BKnw17&wdOrigin=TEAMS-ELECTRON.p2p.bim&wdExp=TEAMS-TREATMENT&wdhostclicktime=1659484200780

Why

To provide context for how this tag is formed and its meaning for whoever is reading this code.

How Tested

n/a

Process & policy checklist

n/a

Is this a breaking change? n/a

[grigoryk]

Similarly on iOS: https://github.com/Azure/communication-ui-library-ios/pull/303 and Android: https://github.com/Azure/communication-ui-library-android/pull/382

We'll find a publicly accessible "shared home" for this info to live in, and replace this doc w/ a link; for now just documenting in code to have a clear reference.

[github-actions[bot]]

Failed to pass the UI Test. If this PR is for UI change and the error is snapshot mismatch, please add "ui change" label to the PR for updating the snapshot.

[github-actions[bot]]

Calling bundle size is not changed.

• Current size: 5337737
• Base size: 5337737
• Diff size: 0

[github-actions[bot]]

Chat bundle size is not changed.

• Current size: 5446444
• Base size: 5446444
• Diff size: 0

[github-actions[bot]]

CallWithChat bundle size is not changed.

• Current size: 5725282
• Base size: 5725282
• Diff size: 0

[github-actions[bot]]

Failed to pass the UI Test. If this PR is for UI change and the error is snapshot mismatch, please add "ui change" label to the PR for updating the snapshot.

[grigoryk]

Oops, lost the changes file in a force push.

[github-actions[bot]]

Failed to pass the composite UI Test. If this PR is for UI change and the error is snapshot mismatch, please add "update_snapshots" label to the PR for updating the snapshot.