[CTS] Add tests for include/exclude in full backup

Bug: 111254233
Test:
1) atest FullbackupRulesHostSideTest
2) Roll back the bug fix
  (https://googleplex-android-review.git.corp.google.com/c/platform/frameworks/base/+/4428154/)
  and verify that FullbackupRulesHostSideTest fails

Change-Id: If8ca8d973edb1b959e3dffa76da6410119b7a5b8
2 files changed