Remove unnecessary override

The observer now provides no-op implementation.

Test: m
Change-Id: I23fcfb4f172f7cabf9aa664a33e8fc8179a49891

services/core/java/com/android/server/BinaryTransparencyService.java

@@ -1073,11 +1073,6 @@ public class BinaryTransparencyService extends SystemService {
 
         // register a package observer to detect updates to preloads
         mPackageManagerInternal.getPackageList(new PackageManagerInternal.PackageListObserver() {
-            @Override
-            public void onPackageAdded(String packageName, int uid) {
-
-            }
-
             @Override
             public void onPackageChanged(String packageName, int uid) {
                 // check if the updated package is a preloaded app.
@@ -1094,11 +1089,6 @@ public class BinaryTransparencyService extends SystemService {
                 UpdateMeasurementsJobService.scheduleBinaryMeasurements(mContext,
                         BinaryTransparencyService.this);
             }
-
-            @Override
-            public void onPackageRemoved(String packageName, int uid) {
-
-            }
         });
 
         // TODO(b/264428429): Register observer for updates to APEXs.