Add virtual dtor for virtual classes

Delete called on non-final virtual classes but non-virtual destructor.

Fixes -Wdelete-non-virtual-dtor warning.

Test: m checkbuild
Change-Id: Ia84c118db1a53f1ac846354a6023726e394a87ed
diff --git a/tools/aapt2/LoadedApk.h b/tools/aapt2/LoadedApk.h
index 6d2257f..81bcecc 100644
--- a/tools/aapt2/LoadedApk.h
+++ b/tools/aapt2/LoadedApk.h
@@ -42,6 +42,8 @@
 // Info about an APK loaded in memory.
 class LoadedApk {
  public:
+  virtual ~LoadedApk() = default;
+
   // Loads both binary and proto APKs from disk.
   static std::unique_ptr<LoadedApk> LoadApkFromPath(const ::android::StringPiece& path,
                                                     IDiagnostics* diag);