Add MOBILE_DATA_PREFERRED_APPS setting am: 521169738c am: 26611dc3d3

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1654015

Change-Id: I25b39c8f35dd80d13775c4a9c5074b2cd8c9f297
tree: 119b1389fddfc8baff5a88677c671dcc2bc7b9cc
  1. core/
  2. framework/
  3. service/
  4. services/
  5. tests/
  6. OWNERS
  7. TEST_MAPPING