Merge changes I2368f118,I57eb7c6d,I66e4e537,If510519b,Ia441170c into main

* changes:
  Skip testRouterSolicitations on T- devices.
  Remove CtsHostsideNetworkTestAppNext.
  Set all hostside network tests apps' target SDK to 10000.
  Consolidate defaults for hostside network tests apps.
  Stop depending on shims in CtsHostsideNetworkTests.