[FL-1795] BLE GAP refactoring (#694)

* ble: remove heart rate profile
* ble-glue: delete dead code
* ble-glue: dis refactoring
* ble-glue: add battery service
* broken ble_common refactoring
* ble-glue: advertise 128 bit service uid
* ble-glue: remove dead code
* ble: advertise service 16 bit uid depending on flipper color
* ble-glue: remove debug
* ble: intriduce serial service
* ble: serial over ble
* bt: serial echo server
* bt: serial service process indicate acknowledge
* bt: serial service event handler update
* bt: refactore battery service
* bt: add battery level apdate API
* power: update battery level on change
* bt: refactore device information service
* app_ble: pairing configuration
* bt: display pin code
* bt: refactor battery service
* bt: refactor device info service
* bt: change advertise timer to freertos one
* bt: separate app_ble to hci and gap
* bt: increase max ble packet size
* gap: refactoring
* bt: refactor serial service
* bt: support f7 target
* bt: not blocking pin code show request

Co-authored-by: Anna Prosvetova <anna@prosvetova.me>
Co-authored-by: あく <alleteam@gmail.com>

firmware/targets/f7/ble-glue/app_conf.h

@@ -139,7 +139,7 @@
 /**
  * Maximum supported ATT_MTU size
  */
-#define CFG_BLE_MAX_ATT_MTU             (156)
+#define CFG_BLE_MAX_ATT_MTU             (251)
 
 /**
  * Size of the storage area for Attribute values