Improve current push provider test: give info about the distributor.

libraries/pushproviders/firebase/src/main/kotlin/io/element/android/libraries/pushproviders/firebase/FirebasePushProvider.kt

@@ -32,6 +32,7 @@ class FirebasePushProvider(
 ) : PushProvider {
     override val index = FirebaseConfig.INDEX
     override val name = FirebaseConfig.NAME
+    override val supportMultipleDistributors = false
 
     override fun getDistributors(): List<Distributor> {
         return listOfNotNull(
@@ -54,6 +55,8 @@ class FirebasePushProvider(
         )
     }
 
+    override suspend fun getCurrentDistributorValue(sessionId: SessionId): String = firebaseDistributor.value
+
     override suspend fun getCurrentDistributor(sessionId: SessionId) = firebaseDistributor
 
     override suspend fun unregister(matrixClient: MatrixClient): Result<Unit> {