Switch on android.telecom.Log in Telecom

Move over the Runnable Class into android.telecom and turn on the
framework's usage in Telecom.

Test: All Telecom unit tests pass. Manual Log testing has also been
confirmed to be working as it did before.
Bug: 26571395
Change-Id: If7e2036c746c5a953f3a77e2d625a423ce5bf8f3