Fix the integration issue for HAL 2.2

Bug: 150670922
Bug: 197297498
Test: A2DP & LE aduio stream works well with HIDL 2.1/2.2
Change-Id: I64113dd4a229874b2d17ae71d088abafd8197cfd
diff --git a/bluetooth/audio/2.2/default/BluetoothAudioProvidersFactory.h b/bluetooth/audio/2.2/default/BluetoothAudioProvidersFactory.h
index 8db330b..658249b 100644
--- a/bluetooth/audio/2.2/default/BluetoothAudioProvidersFactory.h
+++ b/bluetooth/audio/2.2/default/BluetoothAudioProvidersFactory.h
@@ -46,6 +46,9 @@
   Return<void> openProvider_2_1(const V2_1::SessionType sessionType,
                                 openProvider_2_1_cb _hidl_cb) override;
 
+  Return<void> openProvider_2_2(const V2_1::SessionType sessionType,
+                                openProvider_2_2_cb _hidl_cb) override;
+
   Return<void> getProviderCapabilities_2_1(
       const V2_1::SessionType sessionType,
       getProviderCapabilities_2_1_cb _hidl_cb) override;