Move esp32_ble_server to its own component (#1898)

esphome/components/esp32_ble_server/ble_2902.cpp

@@ -0,0 +1,18 @@
+#include "ble_2902.h"
+#include "esphome/components/esp32_ble/ble_uuid.h"
+
+#ifdef ARDUINO_ARCH_ESP32
+
+namespace esphome {
+namespace esp32_ble_server {
+
+BLE2902::BLE2902() : BLEDescriptor(esp32_ble::ESPBTUUID::from_uint16(0x2902)) {
+  this->value_.attr_len = 2;
+  uint8_t data[2] = {0, 0};
+  memcpy(this->value_.attr_value, data, 2);
+}
+
+}  // namespace esp32_ble_server
+}  // namespace esphome
+
+#endif