Quick improvement for analytics reporting

[BillCarsonFr]

Quick improvement on Analytics for posthog that would allow us to better filter reported decryption errors.

This is adding the following properties to all events:
appVersion: similar to what web is doing.
applicationId: the package id
appFlavor: the flavor (googlePlay / FDroid)
cryptoSDK: Parity with web, to allow to use common filters.

Also adding a specific property for E2E domain errors, that are not common to all platforms (is_cross_signed_verified).

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

Motivation and context

Screenshots / GIFs

Tests

• Step 1
• Step 2
• Step ...

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes has been tested on an Android device or Android emulator with API 21
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/element-hq/element-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request includes a new file under ./changelog.d. See https://github.com/element-hq/element-android/blob/develop/CONTRIBUTING.md#changelog
• Pull request includes screenshots or videos if containing UI changes
• Pull request includes a sign off
• You've made a self review of your PR
• If you have modified the screen flow, or added new screens to the application, you have updated the test UiAllScreensSanityTest.allScreensTest()

[bmarty]

OK, I have done a cleanup.