[FL-1816] Fix ble radio stack is alive check. Fix random crashes on storage use.

[gornekich]

What's new

• Fix ble radio stack is alive return
• Add bt_is_active, indicating if advertising is active or not

Verification

• Check device_info with Bluetooth turning off

Checklist (do not modify)

• PR has description of feature/bug or link to Confluence/Jira task
• Description contains actions to verify feature/bugfix
• I've built this code, uploaded it to the device and verified feature/bugfix

[github-actions]

Click here to flash the 11d91cff version of this branch via WebUSB.

[github-actions]

Please fix following code formatting errors:

./applications/cli/cli_commands.c:388:12: error: code should be clang-formatted [-Wclang-format-violations]
    printf("%-20s %-14s %-8s %-8s %s\r\n", "Name", "Stack start", "Heap", "Stack", "Stack min free");
           ^

You might want to run docker compose exec dev /syntax_check.sh for an auto-fix.