Add AppPredictionServiceExists check.

When the flag is set, Chooser will check if APS exists and use it for
direct share ranking. Otherwise, Chooser defaults to just querying ShortcutManager
itself. ResolverActivity will register an appPredictor with ui surface
"resolver" and ChooserActivity will use ui surface "share".

Later, we will add a similar behavior to use the AppPredictor to
sort actvities by default (if it exists), otherwise use the old
API ResolverRankerService.

Test: atest frameworks/base/core/tests/coretests/src/com/android/internal/app
Test: Added parameterized tests for case when there is no AppPredictionService.
Bug:129014961
Change-Id: I6109aa8f2436cf0b3c3b4fbc36e571b2b00fe45c