Fix several test failures for the new starting window.(10/N)

1. Register TestStartingWindowOrganizer to mock add/remove starting
window.
2. Do not show starting window if not occluded.
3. Add ReadFrameBuffer permission so Car can get TaskSnapshot.
4. Correct package path for shell.startingsurface.
5. Do not show starting window for home type.

Bug: 73289295
Bug: 131311659

Test: atest TaplTestsLauncher3
Test: atest WmTests StartingSurfaceDrawerTests TaskSnapshotWindowTest
Test: atest CtsWindowManagerDeviceTestCases
Change-Id: I89930d2e8a05cca6197c36c780ee1843fe454354