DO NOT MERGE Add backup CTS tests on N to known failures

Backup CTS tests need local transport to run properly but local
transport is not whitelisted pre-O on AOSP builds. Since we can't make a
framework change, add device-side and host-side backup CTS modules to
known failures.

Bug: 122746861
Test: run cts -m CtsBackupTestCases; run cts -m CtsBackupHostTestCases
Change-Id: I3a280550fbcdb014e0df24e007ea1e6fb689ac3c
1 file changed