Revert "Revert "Create TAPL test suite for splitscreen""

This reverts commit 313a4403.

Merging will reenable the TAPL suite TaplTestsSplitscreen.java, which was failing on phones due to a function call that only works on tablets.

Fixed by conditionally running the function only on tablet devices.

Fixes: 271852893
Test: Ran tests locally on phone and tablet.
Change-Id: If3e692924ed9c5ee113872e4f8ff0652890d1280