Wait for files to be deleted.

The reboot() call may sometime returns before sys.boot_completed=1. Wait
for the files to be deleted by apexd instead of assuming that they
should already be by the time we call the assertion.

Fix: 195473704
Fix: 195532028
Test: atest
Change-Id: I26a86a14cf47f5787b5bd5a620af569fa3307670
1 file changed