Remove wifi and celluar tiles from qs

These have been unused in AOSP for more than a year, so this removes
what is now dead code. Reduces the number of clients of the wifi and
mobile data pipelines as well.

Test: QSFactoryImplTest
Bug: 238425913
Change-Id: I228ed9438115ca3b0f20a0c5cb5ac3a73e69d09c