Fixes & memory optimizations (#540)

- Disable BlueTooth driver by default, to ensure it doesn't allocate memory
- Update BlueTooth settings app behaviour to make sure it starts/stops the devices
- Disable SPI RAM usage for ST7789 as it broke App Hub
- Reduce T-Display and T-Deck display buffers from 1/3rd to 1/10th of resolution
- Enabled dynamic buffers for MbedTLS to optimize memory
- TLS 1.3 did not work with dynamic buffers: downgrade to 1.2 for now
- WiFi is now enabled from the Boot app callback to the WiFi service, instead of the WiFi service start() function. This avoids a lockup when WiFi is started by the service while the Boot app is updating the WiFi settings.

build-tests/Libraries/SDL/include/SDL2/SDL_quit.h

@@ -0,0 +1,50 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/**
+ * # CategoryQuit
+ *
+ * An SDL_QUIT event is generated when the user tries to close the application
+ * window. If it is ignored or filtered out, the window will remain open. If
+ * it is not ignored or filtered, it is queued normally and the window is
+ * allowed to close. When the window is closed, screen updates will complete,
+ * but have no effect.
+ *
+ * SDL_Init() installs signal handlers for SIGINT (keyboard interrupt) and
+ * SIGTERM (system termination request), if handlers do not already exist,
+ * that generate SDL_QUIT events as well. There is no way to determine the
+ * cause of an SDL_QUIT event, but setting a signal handler in your
+ * application will override the default generation of quit events for that
+ * signal.
+ */
+
+#ifndef SDL_quit_h_
+#define SDL_quit_h_
+
+#include "SDL_stdinc.h"
+#include "SDL_error.h"
+
+/* There are no functions directly affecting the quit event */
+
+#define SDL_QuitRequested() \
+        (SDL_PumpEvents(), (SDL_PeepEvents(NULL,0,SDL_PEEKEVENT,SDL_QUIT,SDL_QUIT) > 0))
+
+#endif /* SDL_quit_h_ */