Settings: Fix queryShortcuts_shouldSortBasedOnPriority test

Previously this test asserted that the resulting ActivityInfo instances
from the queryShortcuts() method were the same address. While this can
assert general equality, it is more robust to assert the resulting
ResolveInfos- mainly that they are sorted by priority.

Bug: b/314924127
Test: atest SettingsRoboTests:com.android.settings.shortcut.CreateShortcutPreferenceControllerTest
Flag: TEST_ONLY
Change-Id: I00210440c7c1a87a6f8eb7a2866ae8571ec7d053