Move UI tests used in snippet to part of integration tests.

We would like to utilize more single device tests to make sure
UI keeps working as expected before running complex end-to-end testing.

Ignore-AOSP-First: nearby_not_in_aosp_yet
Test: atest NearbyIntegrationUiTests
Test: atest CtsNearbyMultiDevicesTestSuite
Bug: 215862502
Change-Id: I28264b3a70c3ee985aae82ca8cf1fcfd955a8d3a
14 files changed