[FL-1937] Bluetooth new assets (#774)

* assets: add new ble assets
* bt: update pairing screen with new icon
* bt: add bt status and update status bar
* bt: update statusbar width from thread
* Icons: new BT icon

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

applications/bt/bt_service/bt_i.h

@@ -15,6 +15,12 @@
 
 #include "../bt_settings.h"
 
+typedef enum {
+    BtStatusOff,
+    BtStatusAdvertising,
+    BtStatusConnected,
+} BtStatus;
+
 typedef enum {
     BtMessageTypeUpdateStatusbar,
     BtMessageTypeUpdateBatteryLevel,
@@ -33,6 +39,7 @@ typedef struct {
 
 struct Bt {
     BtSettings bt_settings;
+    BtStatus status;
     osMessageQueueId_t message_queue;
     Gui* gui;
     ViewPort* statusbar_view_port;