[ld2450] Mark configurable classes as final

Add the C++ final specifier to LD2450Component and its leaf button/number/select/
switch entity classes. Split out of the mechanical final-only series because the
C++ unit test in tests/components/ld2450/common.h subclasses LD2450Component
(TestableLD2450) to expose protected members, so marking the component final
breaks that test. Draft pending a decision on how to handle the test.

esphome/components/ld2450/button/factory_reset_button.h

@@ -5,7 +5,7 @@
 
 namespace esphome::ld2450 {
 
-class FactoryResetButton : public button::Button, public Parented<LD2450Component> {
+class FactoryResetButton final : public button::Button, public Parented<LD2450Component> {
  public:
   FactoryResetButton() = default;
 

esphome/components/ld2450/button/restart_button.h

@@ -5,7 +5,7 @@
 
 namespace esphome::ld2450 {
 
-class RestartButton : public button::Button, public Parented<LD2450Component> {
+class RestartButton final : public button::Button, public Parented<LD2450Component> {
  public:
   RestartButton() = default;
 

esphome/components/ld2450/ld2450.h

@@ -75,7 +75,7 @@ struct ZoneOfNumbers {
 };
 #endif
 
-class LD2450Component : public Component, public uart::UARTDevice {
+class LD2450Component final : public Component, public uart::UARTDevice {
 #ifdef USE_BINARY_SENSOR
   SUB_BINARY_SENSOR(moving_target)
   SUB_BINARY_SENSOR(still_target)

esphome/components/ld2450/number/presence_timeout_number.h

@@ -5,7 +5,7 @@
 
 namespace esphome::ld2450 {
 
-class PresenceTimeoutNumber : public number::Number, public Parented<LD2450Component> {
+class PresenceTimeoutNumber final : public number::Number, public Parented<LD2450Component> {
  public:
   PresenceTimeoutNumber() = default;
 

esphome/components/ld2450/number/zone_coordinate_number.h

@@ -5,7 +5,7 @@
 
 namespace esphome::ld2450 {
 
-class ZoneCoordinateNumber : public number::Number, public Parented<LD2450Component> {
+class ZoneCoordinateNumber final : public number::Number, public Parented<LD2450Component> {
  public:
   ZoneCoordinateNumber(uint8_t zone);
 

esphome/components/ld2450/select/baud_rate_select.h

@@ -5,7 +5,7 @@
 
 namespace esphome::ld2450 {
 
-class BaudRateSelect : public select::Select, public Parented<LD2450Component> {
+class BaudRateSelect final : public select::Select, public Parented<LD2450Component> {
  public:
   BaudRateSelect() = default;
 

esphome/components/ld2450/select/zone_type_select.h

@@ -5,7 +5,7 @@
 
 namespace esphome::ld2450 {
 
-class ZoneTypeSelect : public select::Select, public Parented<LD2450Component> {
+class ZoneTypeSelect final : public select::Select, public Parented<LD2450Component> {
  public:
   ZoneTypeSelect() = default;
 

esphome/components/ld2450/switch/bluetooth_switch.h

@@ -5,7 +5,7 @@
 
 namespace esphome::ld2450 {
 
-class BluetoothSwitch : public switch_::Switch, public Parented<LD2450Component> {
+class BluetoothSwitch final : public switch_::Switch, public Parented<LD2450Component> {
  public:
   BluetoothSwitch() = default;
 

esphome/components/ld2450/switch/multi_target_switch.h

@@ -5,7 +5,7 @@
 
 namespace esphome::ld2450 {
 
-class MultiTargetSwitch : public switch_::Switch, public Parented<LD2450Component> {
+class MultiTargetSwitch final : public switch_::Switch, public Parented<LD2450Component> {
  public:
   MultiTargetSwitch() = default;