Update getAllCiphers query to be consistent with other queries (#413)

app/src/main/java/com/x8bit/bitwarden/data/vault/datasource/disk/dao/CiphersDao.kt

@@ -24,7 +24,7 @@ interface CiphersDao {
     /**
      * Retrieves all ciphers from the database for a given [userId].
      */
-    @Query("SELECT * FROM ciphers WHERE user_id IS :userId")
+    @Query("SELECT * FROM ciphers WHERE user_id = :userId")
     fun getAllCiphers(
         userId: String,
     ): Flow<List<CipherEntity>>