Add CTS testing for ConnectivityDiagnostics Data Stall callback.

Verify that onDataStallSuspected() is invoked by the System when
expected.

ConnectivityDiagnosticsManager provides an API for registering callbacks
with the System. These callbacks allow the System to notify registered
and permissioned callbacks on Network validation, suspected data stalls,
and Network connectivity reported.

Bug: 148032944
Test: atest ConnectivityDiagnosticsManagerTest
Change-Id: If6ceae9d2bbcabf88298d2d8c39cad5275fbd1ef
Merged-In: If6ceae9d2bbcabf88298d2d8c39cad5275fbd1ef
(cherry picked from commit dfcee1ac4a2843884034623601deb78b1a2d84df)
1 file changed
tree: 28308b5fe2a4c2f54f39224eb9744feb58bde644
  1. tests/