Add a trivial test to make apex_targetprep_tests a real test

Test: atest apex_targetprep_tests

Bug: 124140078

(cherry picked from commit 1a8cac87253d09bbdbdc17bbef74c9658d965e49)
Merged-In: I184337d081d32c0bc5c3cc6229b7a8b21e57f8a2
Change-Id: I184337d081d32c0bc5c3cc6229b7a8b21e57f8a2
3 files changed
tree: 93fdcdb6e1666dcda31abaaddac45346175cf63b
  1. apexd/
  2. apexer/
  3. proto/
  4. shim/
  5. tests/
  6. CleanSpec.mk
  7. OWNERS
  8. PREUPLOAD.cfg