Hide Element Call entry point if Element Call service is not available. (#4783)

* Hide Element Call entry point if Element Call service is not available.

* No need to preview the case RoomCallState.Unavailable

* Hide start call action from user profile if Element Call is not available.

* Add mising `use` and cover the problem by a test.

* Update screenshots

* Update enterprise submodule ref.

* Ensure `enterpriseService.isElementCallAvailable()` is not called several times.
And fix unit tests on CI

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

features/enterprise/api/src/main/kotlin/io/element/android/features/enterprise/api/EnterpriseService.kt

@@ -16,6 +16,8 @@ interface EnterpriseService {
     fun defaultHomeserverList(): List<String>
     suspend fun isAllowedToConnectToHomeserver(homeserverUrl: String): Boolean
 
+    suspend fun isElementCallAvailable(): Boolean
+
     fun semanticColorsLight(): SemanticColors
     fun semanticColorsDark(): SemanticColors