Revert "Change the visibility of Config to be public, so it can be accessed from"

This reverts commit a618596be5ddecb8e5756eb9281c95c07505d62f.

Reason for revert: After discussing with tweek@, he pointed out that this may result in a slippery slope where the code may be tested in CTS instead of the device (https://screenshot.googleplex.com/BJZVK4FfXkWB2Rw).

Change-Id: Ic020cb98049c861947ac431c4b3761084e66073e
1 file changed