ActivityRecordInputSink: Ensure timely release of SurfaceControl

Relying on the garbage collector to release SurfaceControl and trigger
destruction of server-side layers has proven to be unreliable in
monkey testing. In this case it may cause the accumulation of
a large number of InputWindowInfo, leading to oneway binder spam.

Bug: 228810413
Test: Existing tests pass
Change-Id: If961767a1209674f202518f8b8be8f930d1a43e3

services/core/java/com/android/server/wm/ActivityRecord.java

@@ -3967,6 +3967,8 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
         } else {
             onRemovedFromDisplay();
         }
+        mActivityRecordInputSink.releaseSurfaceControl();
+
         super.removeImmediately();
     }
 

services/core/java/com/android/server/wm/ActivityRecordInputSink.java

@@ -99,4 +99,11 @@ class ActivityRecordInputSink {
         return inputWindowHandle;
     }
 
+    void releaseSurfaceControl() {
+        if (mSurfaceControl != null) {
+            mSurfaceControl.release();
+            mSurfaceControl = null;
+        }
+    }
+
 }