Remove config files from /system partition

The config files has been previously integrate into the apex.
This CL remove the files in the older path in "/etc/bluetooth" to put
them in "/apex/com.android.bluetooth/etc/bluetooth".

Test: Check if the files are no longer present in /system partition
For the permission files:
Test: atest "CtsPermission2TestCases:android.permission2.cts.PrivappPermissionsTest#privappPermissionsNeedToBeWhitelisted"
Bug: 230359868
Tag:#refactor
Ignore-AOSP-First: no apex on aosp

Change-Id: Ie84bc6cf0df13dffffc84c2633e6a0df4cbf3640