[Device Management] Learn more bottom sheets (PSG-715)

[mnaturel]

Type of change

• [x] Feature
• [ ] Bugfix
• [ ] Technical
• [ ] Other :

Content

Adding a new bottom sheet to display explanations when pressing learn more links in the device manager screens.

Currently in Draft since we will postpone this feature for later.

Motivation and context

Closes #7100

Screenshots / GIFs

TODO

Tests

• TODO

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/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()

[sonarqubecloud[bot]]

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