Revert "Revert "Fix SecurityException while accessing Slice Uris""

This reverts commit 52ac47d9c8.

Reason for revert: This CL is what we wanted to merge in RVC and has already got Code-Review +2, Owner-Approval, and DrNo-Review from other folks regardless of the accident.

Bug: 159195420
Change-Id: I6c646269cd3e13e015dcc06418e21db66372e680

src/com/android/settings/homepage/contextualcards/EligibleCardChecker.java

@@ -110,9 +110,13 @@ public class EligibleCardChecker implements Callable<ContextualCard> {
     @VisibleForTesting
     Slice bindSlice(Uri uri) {
         final SliceViewManager manager = SliceViewManager.getInstance(mContext);
-        manager.pinSlice(uri);
+        final SliceViewManager.SliceCallback callback = slice -> { };
+
+        // Register a trivial callback to pin the slice
+        manager.registerSliceCallback(uri, callback);
         final Slice slice = manager.bindSlice(uri);
-        manager.unpinSlice(uri);
+        manager.unregisterSliceCallback(uri, callback);
+
         return slice;
     }