Move berberis tests to build/core/tasks

Move the executes `berberis_host_tests_result` and
`berberis_run_host_tests` to `build/core/tasks`, as Soong might
currently have difficulty supporting this part.

Set the OWNER of berberis_test.mk

Bug: 321643544
Test: 1. lunch sdk_phone64_x86_64_riscv64-trunk_staging-eng
      2. m berberis_all
      3. m berberis_host_tests_result
      4. m berberis_run_host_tests
Change-Id: I44a03e9eae9ee6a3c82a6d2e6de3a03b2c7d81da