Fix MmTelFeatureConnection Memory Leak

In FeatureConnection, we never cleaned up the ImsFeatureStatusCallback
after it was destroyed, leaving zombie FeatureConnections around.

Bug: 156893040
Test: atest FrameworksTelephonyTests
Change-Id: Idcf8b558c3807a3f9f5094afee532e76ea6f02cb

1 files changed, 8 insertions, 0 deletions

diff --git a/telephony/java/com/android/internal/telephony/ITelephony.aidl b/telephony/java/com/android/internal/telephony/ITelephony.aidl
index f5cd68f050a4..369020033a59 100644
--- a/telephony/java/com/android/internal/telephony/ITelephony.aidl
+++ b/telephony/java/com/android/internal/telephony/ITelephony.aidl
@@ -851,6 +851,14 @@ interface ITelephony {
     IImsRcsFeature getRcsFeatureAndListen(int slotId, in IImsServiceFeatureCallback callback);
 
     /**
+     * Unregister a callback that was previously registered through
+     * {@link #getMmTelFeatureAndListen} or {@link #getRcsFeatureAndListen}. This should always be
+     * called when the callback is no longer being used.
+     */
+    void unregisterImsFeatureCallback(int slotId, int featureType,
+            in IImsServiceFeatureCallback callback);
+
+    /**
     * Returns the IImsRegistration associated with the slot and feature specified.
     */
     IImsRegistration getImsRegistration(int slotId, int feature);