Consider hidden system APIs as allowed intents.

Since we often remove system APIs between releases, we should
consider these removed APIs as being "allowed" for the purposes of
IntentTest.

Test: cts-tradefed run commandAndExit cts-dev -m CtsIntentSignatureTestCases
Bug: 65991376
Change-Id: If63442890bd25b95674f5a840e6a1d48a9214f8b
4 files changed