[FL-2927] SubGhz: add RAW Read threshold rssi (#1911)

* SubGhz: add RAW Read threshold rssi
* SubGhz: update indicator RSSI
* SubGhz: fix record file

Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>

lib/subghz/protocols/raw.h

@@ -103,6 +103,13 @@ void subghz_protocol_encoder_raw_free(void* context);
  */
 void subghz_protocol_encoder_raw_stop(void* context);
 
+/**
+ * pause writing to flash.
+ * @param context Pointer to a SubGhzProtocolEncoderRAW instance
+ * @param pause pause writing
+ */
+void subghz_protocol_raw_save_to_file_pause(SubGhzProtocolDecoderRAW* instance, bool pause);
+
 /**
  * Set callback on completion of file transfer.
  * @param instance Pointer to a SubGhzProtocolEncoderRAW instance