Add tests for min-heap sorting in Share-sheet

Adjust test to cover right method in ChooserActivityTest. Add a test in ResolverListControllerTest to assrt that the top k elements are same between sort and topK method.

Bug: 142558305
Test: Passed all unit tests in ChooserActivityTest and ResolverListControllerTest with changes in other 2 CLs in the same topic.
Change-Id: I98c5a84e498e0189a5fe6b5a82216f0dc338c32e