Refactored AccessibleDragListnerAdapter to kotlin for null safety and removed a explicit call to Launcher. Added tests for all public methods
* Refactored 1 class
* Tested 1 class previously untested
* Tested 4 public methods
Bug: 353303621
Test: AccessibleDragListnerAdapterTest
Flag: TEST_ONLY
Change-Id: I7db70330f5e76b8f7298304314584e88e067c139
Adding unit tests for FolderAccessibilityHelper. In order to write these tests we have also included a refactor of DragAndDropAccessibilityDelegate to get mDragLayer and the accessibility delegate from ActivityContext instead of Launcher. This allows us to pull that from test context in ActivityContextWrapper during testing.
* Tests 1 class previously untested
* Tests 3 methods
* Includes 1 class refactor
Bug: 353303621
Test: FolderAccessibilityHelperTest
Flag: TEST_ONLY
Change-Id: I8d13113fc09d3ee902faecc426deb80bcbae0b0d
Andrew Cole