[FL-1946] RPC App launch (#758)

* RPC: Add App start, lock status
 - Add RPC commands Application start, lock status acquiring.
 - Write tests for RPC App system.
 - Replace Unit Tests application with CLI command. This is for CI needs and for tests that run application.
* Fix NDEBUG build
* Update PB submodule
* Fix RPC print (ENABLE DEBUG PRINT!)
* snprintf -> string_t
* Fix Hard Fault (early mutex free)
* printf -> string_t, format, enable tests
* Update submodule: protobuf
* Applications: rollback unit test naming scheme.

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

applications/rpc/rpc_storage.c

@@ -340,6 +340,7 @@ static void rpc_system_storage_md5sum_process(const PB_Main* request, void* cont
 
         char* md5sum = response.content.storage_md5sum_response.md5sum;
         size_t md5sum_size = sizeof(response.content.storage_md5sum_response.md5sum);
+        (void)md5sum_size;
         furi_assert(hash_size <= ((md5sum_size - 1) / 2));
         for(uint8_t i = 0; i < hash_size; i++) {
             md5sum += sprintf(md5sum, "%02x", hash[i]);