Add connection serivce focus api interface

This add new api interface to ConnectionService to support the
connection service focus api.

Bug: 69651192
Test: manually

Change-Id: Iea49d95b086d32a0ebaf8e9f34fe4556953a0fd5
Merged-In: Iea49d95b086d32a0ebaf8e9f34fe4556953a0fd5
diff --git a/telecomm/java/android/telecom/ConnectionServiceAdapter.java b/telecomm/java/android/telecom/ConnectionServiceAdapter.java
index 92a9dc2..0d319bb 100644
--- a/telecomm/java/android/telecom/ConnectionServiceAdapter.java
+++ b/telecomm/java/android/telecom/ConnectionServiceAdapter.java
@@ -628,4 +628,17 @@
             }
         }
     }
+
+    /**
+     * Notifies Telecom that the {@link ConnectionService} has released the call resource.
+     */
+    void onConnectionServiceFocusReleased() {
+        for (IConnectionServiceAdapter adapter : mAdapters) {
+            try {
+                Log.d(this, "onConnectionServiceFocusReleased");
+                adapter.onConnectionServiceFocusReleased(Log.getExternalSession());
+            } catch (RemoteException ignored) {
+            }
+        }
+    }
 }