Delete package directory when app is uninstalled.

Test: Built and test on device.
Bug: 149946247
Change-Id: I57cbd3d853dad7a4d291427c53e0ef1b61274893

services/people/java/com/android/server/people/data/PackageData.java

@@ -26,6 +26,7 @@ import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.UserIdInt;
 import android.content.LocusId;
+import android.os.FileUtils;
 import android.text.TextUtils;
 import android.util.ArrayMap;
 
@@ -251,5 +252,6 @@ public class PackageData {
     void onDestroy() {
         mEventStore.onDestroy();
         mConversationStore.onDestroy();
+        FileUtils.deleteContentsAndDir(mPackageDataDir);
     }
 }