[Ravenwood] Move *_host classes into their corresponding package

This allows the host classes to reference package private members of the
original class. This also makes the redirection class annotation much
cleaner, as the host classes are in the same package.

Bug: 292141694
Flag: EXEMPT host test change only
Test: $ANDROID_BUILD_TOP/frameworks/base/ravenwood/scripts/run-ravenwood-tests.sh
Change-Id: I01c184ddc3c8cf5d075113e310296c67e0b697d1
21 files changed