Move OverlayHostTests back to general-tests

While the overlay APKs must be built with the "device-tests" as their
test suite to get signed correctly, the jar containing the test should
target general-tests so the test class can be found.

Bug: 156129546
Test: atest OverlayHostTests
Change-Id: I08217e368e7284f69155eaf3b957724f9f0154d4
1 file changed