Add a test base for AbsSwipeUpHandler and its subclasses

- Added a few basic tests for scenarios that should be contant across subclasses. These tests will not run on their own, they will only run when a subclass' test suite is run.
- Added test suites for LauncherSwipeHandlerV2 and FallbackSwipeHandler

Flag: EXEMPT adding tests
Bug: 353763639
Test: LauncherSwipeHandlerV2Test, FallbackSwipeHandlerTest
Change-Id: Ib44199f5d5281a544b433649d6ed49ae2a65ed70