Add an empty state for the space screen if the user can modify its graph (#6064)

* Add an empty state for the space screen if the user can modify its graph. It adds a new 'create room' button that allows you to open the create room screen with some preset values.

* When computing the editable spaces in `ConfigureRoomPresenter`, also set up the initial selected parent space if possible

* Use `Builder` pattern for `CreateRoomEntryPoint`

* Update screenshots

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Co-authored-by: ElementBot <android@element.io>

features/createroom/test/build.gradle.kts

@@ -16,5 +16,6 @@ android {
 dependencies {
     implementation(projects.features.createroom.api)
     implementation(projects.libraries.architecture)
+    implementation(projects.libraries.matrix.api)
     implementation(projects.tests.testutils)
 }