Add ActivityEmbeddingLaunchTests#testSplitWithTopmostActivity

Creates a test that verifies that launching activities with
wildcard split rules results in the newly launched activity
being split with the activity that has the highest z-order,
which is the top activity in the secondary stack.

Bug: b/202748345
Test: atest
CtsWindowManagerJetpackTestCases: ActivityEmbeddingLaunchTests#testSplitWithTopmostActivity
Change-Id: I379817ab58f24aa22c038004c167ca4c8b972255
1 file changed