Move connectivity sources to packages/Connectivity

The service-connectivity sources should be in
packages/modules/Connectivity. Move them to
frameworks/base/packages/Connectivity, so that the whole directory can
be moved to the dedicated packages/modules/Connectivity git project.

Bug: 186628461
Test: m
Change-Id: I26d1a274058fa38763ad4f605549d880865b4d76
26 files changed