Fix a bug in Activity Up navigation dispatching

Propagate the return value from onNavigateUp as the result of
onMenuItemSelected. This fixes a bug where the action bar Up nav
button clicks would not be propagated to support lib FragmentActivity
or other activity subclasses that rely on processing otherwise
unhandled onMenuItemSelected events.

Change-Id: Id879dd1756ed06b8a7b720ebf0eae2a8ddc66ca8

Author: adamp

core/java/android/app/Activity.java

@@ -2540,11 +2540,10 @@ public boolean onMenuItemSelected(int featureId, MenuItem item) {
                 if (item.getItemId() == android.R.id.home && mActionBar != null &&
                         (mActionBar.getDisplayOptions() & ActionBar.DISPLAY_HOME_AS_UP) != 0) {
                     if (mParent == null) {
-                        onNavigateUp();
+                        return onNavigateUp();
                     } else {
-                        mParent.onNavigateUpFromChild(this);
+                        return mParent.onNavigateUpFromChild(this);
                     }
-                    return true;
                 }
                 return false;