Revert "Fix SecurityException while accessing Slice Uris"

This reverts commit 2e790e1859.

Reason for revert: I accidentally +2'd this CL and it got merged. Sorry about that.

Change-Id: Ia1b2e0a264e16b368601bbb7a32148ec6c183e84
Bug: 159195420
Exempt-From-Owner-Approval: Just a revert

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

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