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

libraries/pushproviders/api/src/main/kotlin/io/element/android/libraries/pushproviders/api/PushProvider.kt

@@ -24,6 +24,11 @@ interface PushProvider {
      */
     val name: String
 
+    /**
+     * true if the Push provider supports multiple distributors.
+     */
+    val supportMultipleDistributors: Boolean
+
     /**
      * Return the list of available distributors.
      */
@@ -34,6 +39,11 @@ interface PushProvider {
      */
     suspend fun registerWith(matrixClient: MatrixClient, distributor: Distributor): Result<Unit>
 
+    /**
+     * Return the current distributor, or null if none.
+     */
+    suspend fun getCurrentDistributorValue(sessionId: SessionId): String?
+
     /**
      * Return the current distributor, or null if none.
      */