Add fall back to createTunInterface when running on R

TNM.createTunInterface() takes different parameter from S.
GTS is multi-release, so it should be compatible with S
and before S build. Add sdk version check to support it.

Bug: 186680038
Test: atest GtsNetworkStackHostTestCases:\
      com.google.android.gts.networkstack.NetworkStackHostTest#\
      testNetworkStack
Change-Id: I5a08068db43e507637a53a32c15a5eb453d50c32