Expose quality APIs publically after refactoring them to match external
usage of quality constants. Removes list of location requests from
provider request, as there is no client that really uses this, and it
feels like too much information to give to providers.
Bug: 168624248
Test: presubmits
Change-Id: Icf8a9f6096da0071d97190d3f7196948492e52a1
f6a861a34f