Add a db query to get all the Sessions.

libraries/session-storage/api/src/main/kotlin/io/element/android/libraries/sessionstorage/api/SessionStore.kt

@@ -22,6 +22,7 @@ interface SessionStore {
     fun isLoggedIn(): Flow<Boolean>
     suspend fun storeData(sessionData: SessionData)
     suspend fun getSession(sessionId: String): SessionData?
+    suspend fun getAllSessions(): List<SessionData>
     suspend fun getLatestSession(): SessionData?
     suspend fun removeSession(sessionId: String)
 }