Create InputManager TEST_MAPPING with WindowInputTests

CL ag/12660805 broke tests and had to be reverted because its local base
didn't include a change in the tests that happened in ToT (ag/12556011).
Addint test to presubmit of InputManager to catch these.

Test: 1. In frameworks/native/services/inputflinger, run:
         atest --test-mapping --dry-run
      2. Verify output contains WindowInputTests
Bug: 158002302
Change-Id: I1a8e97c5fbec771f44d3a30aad2870a046a960bb