Remove BluetoothRouteControllerTest

It's failing and it's not running as part of pre/post
submit. We could consider re-adding part of the test
once ag/25740390 is merged, if we deem these tests
useful to keep around.

Bug: b/25740390
Test: N/A. Removing test.
Change-Id: I33eca8b60c8100c60632cd71f90ab27bd9506bc4