Update CTS for the READ_CLIPBOARD_IN_BACKGROUND permission

Update PermissionPolicyTest to match the updated permission config.

Add a test to verify that reading from the clipboard in the background
requires the READ_CLIPBOARD_IN_BACKGROUND permission.

Bug: 216314180
Test: atest CtsPermission2TestCases:PermissionPolicyTest
Test: atest CtsContentTestCases:ClipboardReadAccessTest
Test: atest CtsContentTestCases:ClipboardManagerTest
Change-Id: I6f3fbe3fe8d997a5f4420e1b8ed413042fb1c10e
2 files changed