Remove Enhanced Connectivity Dev Option

Applying to d1-dev as this change will be propagated to qpr branch.

Remove Developer Option Enhanced Connectivity. Remove controller and
layout variables/tests.

Bug: 162231796
Test: On Device Custom Build. Testing BSM trigger. Developer Option does
not appear anymore.

Change-Id: I58938faa299e30d4f357ed4e094b8548964b9dcc