Display a bottom sheet to let user confirm the DM creation

[bmarty]

Content

To avoid creating DM by mistake, this PR adds a confirmation bottom sheet at the 2 places where a DM can be created.

The dialog is not shown if the DM already exists.

Figma: https://www.figma.com/design/dywzKQvHYxFD1Ncn4a5NkI/PSB-675%3A-Improve-invite-into-a-DM?node-id=12-36886

Motivation and context

Limit DM created by mistake with the wrong user.

Screenshots / GIFs

StartDMConfirmationDialog.mp4

Tests

Try to create a DM and see the confirmation dialog from:

• a user profile page
• the room creation flow

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes have been tested on an Android device or Android emulator with API 24
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request title will be used in the release note, it clearly define what will change for the user
• Pull request includes screenshots or videos if containing UI changes
• You've made a self review of your PR

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[codecov]

Codecov Report

Attention: Patch coverage is 89.61039% with 8 lines in your changes missing coverage. Please review.

Project coverage is 80.23%. Comparing base (6362e01) to head (1214b20).
Report is 9 commits behind head on develop.

Files with missing lines	Patch %	Lines
...eatures/createroom/impl/root/CreateRoomRootView.kt	62.50%	2 Missing and 1 partial ⚠️
...oid/features/userprofile/shared/UserProfileView.kt	62.50%	2 Missing and 1 partial ⚠️
...roid/features/createroom/test/FakeStartDMAction.kt	66.66%	1 Missing ⚠️
...x/ui/components/CreateDmConfirmationBottomSheet.kt	97.50%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #4233      +/-   ##
===========================================
+ Coverage    80.22%   80.23%   +0.01%     
===========================================
  Files         2043     2045       +2     
  Lines        54113    54182      +69     
  Branches      6570     6576       +6     
===========================================
+ Hits         43411    43473      +62     
- Misses        8429     8434       +5     
- Partials      2273     2275       +2     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud