Shortcut integration with AppSearch (part 4)

To prevent starving binder thread over synchrounous operation, following
changes were made in this CL:
1, Create oneway apis in aidl
2. Annotation to ensure existing api call are running in WorkerThread

Bug: 180558621
NoNonSdkCheck: ShortcutService is for internal use, not a public api.
It should have been put in block-list in the first place.
Test: no change in functionality, covered by existing unit/cts tests
Change-Id: I17ecbaa7f2da30babec9fd58af7f07d5c0594054