Update the flag as bug fix

Flag: com.android.server.telecom.flags.keep_bt_devices_cache_updated
Bug: 380323024
Test: make
Change-Id: Ic0bd82ba1bbc6ac24c7cd4ab7be91222b6f758d1
diff --git a/flags/telecom_bluetoothdevicemanager_flags.aconfig b/flags/telecom_bluetoothdevicemanager_flags.aconfig
index 3757c72..9b1b53e 100644
--- a/flags/telecom_bluetoothdevicemanager_flags.aconfig
+++ b/flags/telecom_bluetoothdevicemanager_flags.aconfig
@@ -14,4 +14,7 @@
   namespace: "telecom"
   description: "Fix the devices cache issue of BluetoothDeviceManager"
   bug: "380320985"
+  metadata {
+    purpose: PURPOSE_BUGFIX
+  }
 }