Add test for aconfig flags support on ravenwood

Flag: EXEMPT host test change only
Bug: 311370221

Test: $ANDROID_BUILD_TOP/frameworks/base/ravenwood/scripts/run-ravenwood-tests.sh
Test: atest RavenwoodBivalentTest_device RavenwoodBivalentTest_device_ravenizer

Change-Id: I9671ba19f6ef5466553040da0aadcac4b8cffc0a
2 files changed