Merged from http://go/wvgerrit/147689
The default is to build for AIDL Widevine service.
Use "-t hidl" in build_and_run_all_unit_tests.sh or
build_all_unit_tests.sh to build for HIDL service.
Test: ./build_all_unit_tests -t hidl
Test: ./build_and_run_all_unit_tests -t hidl
Test: ./build_all_unit_tests
Test: ./build_and_run_all_unit_tests
Bug: 217247987
Change-Id: Ie7c51033f4aba341c829ccc8f846a6cfeab76df3