Fix the two test cases testForbidCapabilitiesRequest and testRequestCapabilitiesFromCacheWithPresenceMechanism in RcsUceAdapter

1. If carrier doesn't support the group subscribe, the subscribe request will be devicided into many sub-requests and cause the test case failed.

2. The test testRequestCapabilitiesFromCacheWithPresenceMechanism may fail randomly because the results of contact capabilities may be out of order. But the test case assumes that the results are in order.

Bug: 204516937
Test: atest RcsUceAdapterTest --iterations 3
Change-Id: I80fa236551eaeab64c8da6e1f63b61556a0e338a