Auto-gen AndroidTest.xml for CorePerfTests so atest can run it.

Bug: 68946306
Test: atest CorePerfTests
https://sponge.corp.google.com/target?id=5238c8a7-0016-485f-9eb4-7a91fe86c454&target=CorePerfTests&searchFor=&show=ALL&sortBy=STATUS
Change-Id: I4fe680dddb51151e17546704f554813a588e5f86