Merge "Add a routing coordinator class" into main

Tethering/src/android/net/ip/IpServer.java

...ing/src/com/android/networkstack/tethering/Tethering.java

...android/networkstack/tethering/TetheringDependencies.java

Tethering/tests/unit/src/android/net/ip/IpServerTest.java

...src/com/android/networkstack/tethering/TetheringTest.java

framework/Android.bp

framework/jarjar-excludes.txt

framework/src/android/net/ConnectivityManager.java

framework/src/android/net/IConnectivityManager.aidl

framework/src/android/net/IRoutingCoordinator.aidl

framework/src/android/net/RouteInfo.java

framework/src/android/net/RoutingCoordinatorManager.java

...net/connectivity/TiramisuConnectivityInternalApiUtil.java

service/src/com/android/server/ConnectivityService.java

...ndroid/server/connectivity/RoutingCoordinatorService.java

...ient-libs/netd/com/android/net/module/util/NetdUtils.java

...iclibs/framework/com/android/net/module/util/SdkUtil.java