ANDROID: Check arch before running kunit

KUnit configurations include KernelTestModuleController that skips the
tests for mismatching architectures.

Test: ./run_test_only.sh --gcov -s 0.0.0.0:6520 -t \
      'kunit soc-utils-test#soc-utils'
Bug: 358439710
Change-Id: I5b1daee4329c9b9cf1d534d0ea88b41d76cfa7bc
Signed-off-by: Hsin-Yi Chen <hsinyichen@google.com>