[FL-1952] BLE bonding fix (#805)

* furi-hal-bt: add mutex guarding core2 state
* ble-glue: configure ble keys storage in SRAM2
* bt: add load and save ble keys in internal storage
* bt: improve work furi_hal_bt API
* bt: rework app_entry -> ble_glue
* bt: apply changes for f6 target
* desktop: remove furi check
* ble-glue: comment NVM in SRAM2 configuration
* FuriHal: fix flash controller state corruption, fix incorrect semaphore release, implement C1-C2 flash controller access according to spec. Gui: change logging level.
* Libs: better lfs integration with lfs_config.
* Ble: switch C2 NVM to RAM.
* FuriHalCrypto: ensure that core2 is alive before sending shci commands
* Ble: fix incorrect nvm buffer size

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

firmware/targets/f7/furi-hal/furi-hal-crypto.c

@@ -1,4 +1,5 @@
 #include <furi-hal-crypto.h>
+#include <furi-hal-bt.h>
 #include <furi.h>
 #include <shci.h>
 
@@ -12,6 +13,10 @@ bool furi_hal_crypto_store_add_key(FuriHalCryptoKey* key, uint8_t* slot) {
     furi_assert(key);
     furi_assert(slot);
 
+    if(!furi_hal_bt_is_alive()) {
+        return false;
+    }
+
     SHCI_C2_FUS_StoreUsrKey_Cmd_Param_t pParam;
     size_t key_data_size = 0;
 
@@ -44,6 +49,10 @@ bool furi_hal_crypto_store_add_key(FuriHalCryptoKey* key, uint8_t* slot) {
 bool furi_hal_crypto_store_load_key(uint8_t slot, const uint8_t* iv) {
     furi_assert(slot > 0 && slot <= 100);
 
+    if(!furi_hal_bt_is_alive()) {
+        return false;
+    }
+
     crypt.Instance = AES1;
     crypt.Init.DataType = CRYP_DATATYPE_32B;
     crypt.Init.KeySize = CRYP_KEYSIZE_256B;
@@ -63,6 +72,10 @@ bool furi_hal_crypto_store_load_key(uint8_t slot, const uint8_t* iv) {
 }
 
 bool furi_hal_crypto_store_unload_key(uint8_t slot) {
+    if(!furi_hal_bt_is_alive()) {
+        return false;
+    }
+
     furi_check(HAL_CRYP_DeInit(&crypt) == HAL_OK);
     return SHCI_C2_FUS_UnloadUsrKey(slot) == SHCI_Success;
 }