Update classique laucher icon

[raphael-chevallier]

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/tchapgouv/tchap-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/tchapgouv/tchap-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()

[tchap-danger-bot]

	Fails
🚫	Please add a sign-off to either the PR description or to the commits themselves. See instructions here.

	Warnings
⚠️	Please add a changelog. See instructions here
⚠️	You seem to have made changes to some images. Please consider using an vector drawable.
⚠️	Please add a reviewer to your PR.

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