Add a presence sync enabling build config

[aringenbach]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

This PR adds a build config setting to disable Presence sync and display on the client side.

Motivation and context

Fixes #5563

Screenshots / GIFs

Tests

• Step 1: Set new build config to false
• Step 2: Connect on a server where Presence is enabled

Tested devices

• Physical
• Emulator
• OS version(s): Android 12

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/vector-im/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/vector-im/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()

[github-actions]

Unit Test Results

102 files  ±0  102 suites  ±0   1m 18s ⏱️ +9s
182 tests ±0  182 ✔️ ±0  0 💤 ±0  0 ❌ ±0 
598 runs  ±0  598 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 7593f7a. ± Comparison against base commit 36564d3.

♻️ This comment has been updated with latest results.

[ouchadam]

could be nice to make use of the VectorFeatures if we want to also allow debug runtime overriding instead of only relying on separate builds https://github.com/vector-im/element-android/blob/develop/vector/src/main/java/im/vector/app/features/VectorFeatures.kt#L36

[ouchadam]

thanks for the update! 💯