Add new e2e test case: initial_pairing_test.

This test verify initial pairing between mainline seeker and
provider simulator. The "pair" is triggered by halfsheet UI.
Test pass if account key device saved on seeker side match
with the one wrote at provider side.

Test: atest -v CtsNearbyMultiDevicesTestSuite
Test: http://recall/-/cycSROwIosTzHgYDSIqPXl/fteYnrnJAwKqYYewUDPUxz
Bug: 214015364
Ignore-AOSP-First: nearby_not_in_aosp_yet
Change-Id: Ida5ba2eea527d1662209a6f60b547398dcdc14e9
diff --git a/nearby/tests/multidevices/host/suite_main.py b/nearby/tests/multidevices/host/suite_main.py
index 406a4f0..4f5d48c 100644
--- a/nearby/tests/multidevices/host/suite_main.py
+++ b/nearby/tests/multidevices/host/suite_main.py
@@ -19,6 +19,7 @@
 
 from mobly import suite_runner
 
+import initial_pairing_test
 import seeker_discover_provider_test
 import seeker_show_halfsheet_test
 
@@ -26,6 +27,7 @@
 _TEST_CLASSES_LIST = [
     seeker_discover_provider_test.SeekerDiscoverProviderTest,
     seeker_show_halfsheet_test.SeekerShowHalfSheetTest,
+    initial_pairing_test.InitialPairingTest,
 ]