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.

TactilityKernel/include/tactility/device.h

@@ -291,6 +291,14 @@ struct Device* device_find_by_name(const char* name);
  */
 struct Device* device_find_first_active_by_type(const struct DeviceType* type);
 
+/**
+ * Find the first device of the given type.
+ *
+ * @param[in] type non-null device type pointer
+ * @return the first device of the given type, or NULL if none found
+ */
+struct Device* device_find_first_by_type(const struct DeviceType* type);
+
 #ifdef __cplusplus
 }
 #endif

TactilityKernel/source/device.cpp

@@ -386,4 +386,13 @@ Device* device_find_first_active_by_type(const DeviceType* type) {
     return found;
 }
 
+Device* device_find_first_by_type(const DeviceType* type) {
+    Device* found = nullptr;
+    device_for_each_of_type(type, &found, [](Device* dev, void* ctx) -> bool {
+        *static_cast<Device**>(ctx) = dev;
+        return false;
+    });
+    return found;
+}
+
 } // extern "C"