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.

Devices/lilygo-tdeck/Source/devices/Display.cpp

@@ -38,7 +38,7 @@ std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay() {
         .backlightDutyFunction = driver::pwmbacklight::setBacklightDuty,
         .resetPin = GPIO_NUM_NC,
         .lvglSwapBytes = false,
-        .buffSpiram = true
+        .buffSpiram = false // Enabling leads to crashes when refreshing App Hub list
     };
 
     auto spi_configuration = std::make_shared<St7789Display::SpiConfiguration>(St7789Display::SpiConfiguration {