Allow VTS verifier to post toast in AAOS

Bug: 203894736
Bug: 185258149
Test: manually run CTS-V toast test and verify toast is posted
Change-Id: I2b9fb12014342d7eb7043100d88100e2b91938d6
(cherry picked from commit e9406ad978deb2f12a1520e87749dc93f8987dbf)
1 file changed