Add test for permission escalation after reboot.

Bug: 168319670, 154505240
Test: atest android.appsecurity.cts.PermissionsHostTest#testNoPermissionEscalationAfterReboot
Change-Id: I757a394ae0430d885c61faede481b491dc7c5444
Merged-In: I757a394ae0430d885c61faede481b491dc7c5444
Exempt-From-Owner-Approval: patb@ approved it on behalf of toddke
2 files changed