Add flag to control whether to disconnect the GATT client when exiting the BLE GATT service.

PiperOrigin-RevId: 758474539

internal/platform/implementation/apple/Flags/GNCFeatureFlags.h

@@ -20,4 +20,7 @@
 /** Checks whether DCT is enabled in the Nearby Connections SDK. */
 @property(nonatomic, class, readonly) BOOL dctEnabled;
 
+/** Checks whether GATT client disconnection is enabled in the Nearby Connections SDK. */
+@property(nonatomic, class, readonly) BOOL gattClientDisconnectionEnabled;
+
 @end

internal/platform/implementation/apple/Flags/GNCFeatureFlags.mm

@@ -24,4 +24,10 @@
       nearby::connections::config_package_nearby::nearby_connections_feature::kEnableDct);
 }
 
++ (BOOL)gattClientDisconnectionEnabled {
+  return nearby::NearbyFlags::GetInstance().GetBoolFlag(
+      nearby::connections::config_package_nearby::nearby_connections_feature::
+          kEnableGattClientDisconnection);
+}
+
 @end

internal/platform/implementation/apple/ble_gatt_client.mm

@@ -133,9 +133,8 @@ void GattClient::Disconnect() {
   // not connect to the iOS device if the iOS device disconnects and then attempts to reconnect.
   // Because of this, we no-op here instead of calling `[gatt_client_ disconnect]`.
   // See: b/375176623
-  if (GNCFeatureFlags.dctEnabled) {
-    // Avoid to impact GTV functionality, put the disconnect for NC iOS SDK only, so thatGATT client
-    // can reconnect to the GATT server.
+  if (GNCFeatureFlags.gattClientDisconnectionEnabled) {
+    // Avoid to impact GTV functionality, so that GATT client can reconnect to the GATT server.
     [gatt_client_ disconnect];
   }
 }