Revert "[Settings] Support getSystemService(Class<T>)"

This reverts commit d5ccde31a8.

Reason for revert: failure on test cases

Change-Id: I0a179a6ebb5ef1dec566ce6e8facd5f3b82d7c8a

src/com/android/settings/deviceinfo/StorageWizardMigrateConfirm.java

@@ -121,7 +121,7 @@ public class StorageWizardMigrateConfirm extends StorageWizardBase {
         try {
             moveId = getPackageManager().movePrimaryStorage(mVolume);
         } catch (IllegalArgumentException e) {
-            StorageManager sm = getSystemService(StorageManager.class);
+            StorageManager sm = (StorageManager) getSystemService(STORAGE_SERVICE);
 
             if (Objects.equals(mVolume.getFsUuid(), sm.getPrimaryStorageVolume().getUuid())) {
                 final Intent intent = new Intent(this, StorageWizardReady.class);