Root Cause: The lifecycle for
AccessibilityShortcutPreferenceFragmentTest did not be called correctly.
Solution:
* Call onAttach() before onCreate() to some config, e.g.
FeatureFactory.
* Use ShadowFragment.class that we usually do in accessibility
tests.
Fix: 200906425
Fix: 201020915
Test: atest AccessibilityShortcutPreferenceFragmentTest
Change-Id: I3391c0a4a2c7c361a44c7d282b1d5d3e75a28a39
2d3894a148