Add CTS test to verify router solicitation backoff

Add two new test cases to ConnectivityManagerTest:
testRouterSolicitations()
testRouterSolicitationMaxInterval()

Bug: 33620395
Test: ConnectivityManagerTest CTS test passes with WIFI on/off
Change-Id: Iac8979dfab29ae75343a355d02acfb0f39b491f9
1 file changed
tree: a382a1d719dd3d3f49bfd7dce3bb9bb5865f2126
  1. tests/