Make list of SADs to query configurable

Additionally,
- refactor RC_PROFILE_SOURCE_ setting to use same convention
for allowed values.
- add @see links to all CEC configuration constants and APIs.
- remove @hide @SystemApi annotations on individual fields, since that
is the annotation of the class and therefore the default annotation for
all of its fields.

Bug: 196044080
Test: atest
Change-Id: I87bc80f82fa78ab8df994768189c61e4892db1a0