Add stub implementation of adding reg and cap callbacks.

To unblock SMS/IMS reg integration.

Test: manually testing failure and retry logic only now
as testing success case is not yet feisble.

BUG=69846044
Merged-In: I7b6066306a09db9dfd0f332661ea078407c5a960
Change-Id: I7b6066306a09db9dfd0f332661ea078407c5a960
1 file changed
tree: def4e404db78d1c2eaa6477a3e3885be3f0679cf
  1. src/
  2. tests/
  3. Android.mk
  4. CleanSpec.mk
  5. OWNERS
  6. README.txt