[Ravenwood] Mock UiAutomation to support permission APIs

On Ravenwood, since there are no "permissions", we can provide no-op
implementations for adopt/drop shell permissions method families in
UiAutomation. To prevent pulling in a lot of unnecessary internal
dependencies of UiAutomation, we simply inject a mock UiAutomation in
our Instrumentation class.

Flag: EXEMPT host test change only
Bug: 292141694
Test: atest RavenwoodBivalentTest
Test: $ANDROID_BUILD_TOP/frameworks/base/ravenwood/scripts/run-ravenwood-tests.sh
Change-Id: I8826a8c491efa5fc8d6cb10cf11c6dd677ad7f31