Update set device suggestion API to take in RouteInfo

Device suggestions are applicable for routes backed by MR2 and thus do
not work for legacy system routes. Taking in RouteInfo instead of
SuggestedDeviceInfo helps in validating the route provider and filtering
out unsupported routes from suggestions.

Relnote: "Update `MediaRouter`#`setDeviceSuggestions` to take in `RouteInfo`
instead of `SuggestedDeviceInfo`"
Test: ./gradlew :mediarouter:mediarouter:connectedAndroidTest
Bug: 500281097

Change-Id: Id1d8cfceec0cdfde7463fa6c9553c3e3fc45d76e