Make Ravenwood less verbose

- Demote some logs from `i` to `v`. (so it'll be easier to filter them out)
- Guard some of the really verbose log with RAVENWOOD_VERBOSE_LOGGING

Flag: EXEMPT host test change only
Bug: 292141694
Test: $ANDROID_BUILD_TOP/frameworks/base/ravenwood/scripts/run-ravenwood-tests.sh
Change-Id: I30934ecb03929a103ff941e78605a8ca11033dfa