Support more utils under Ravenwood.

Tests for these internal utils are local within the frameworks/base/
repo, instead of in CTS.

To help future-proof, bring the entire utils/* test directory by
default into the Ravenwood suites, and give developers the way to
easily opt-out with @IgnoreUnderRavenwood at the class level.

Bug: 292141694
Test: atest FrameworksCoreTestsRavenwood FrameworksCoreTests
Test: atest FrameworksUtilTestsRavenwood FrameworksUtilTests
Change-Id: Ibcabec764efa31cc8cb4c56d7815948d4029aaea