Added LocusId support to Shortcut and Notification.

Test: atest FrameworksCoreTests:android.app.NotificationTest#testBuilder_setLocusId
Test: atest CtsShortcutManagerTestCases:android.content.pm.cts.shortcutmanager.ShortcutManagerClientApiTest
Test: atest CtsShortcutManagerTestCases # sanity check; some tests are failing, but pass individually

Test: m update-api
Bug: 126945732

Change-Id: Ib819a63aa008ab952b02da8c0be1b528814dfb00