Merge "Make mirroring sessions releasable" into main

import static android.media.MediaRoute2Info.FEATURE_LIVE_VIDEO;

import static android.media.MediaRoute2Info.PLAYBACK_VOLUME_FIXED;

import static android.media.MediaRoute2ProviderService.REQUEST_ID_NONE;

import static android.media.RoutingSessionInfo.RELEASE_TYPE_CASTING;

import android.annotation.NonNull;

import android.annotation.Nullable;

                            .clearSelectedRoutes()

                            .clearSelectableRoutes()

                            .clearDeselectableRoutes()

                            .clearTransferableRoutes();

                            .clearTransferableRoutes()

                            .setReleaseType(RELEASE_TYPE_CASTING);

            session.getSelectedRoutes().stream()

                    .map(it -> uniqueIdAsSystemRouteId(session.getProviderId(), it))

                    .forEach(builder::addSelectedRoute);