Guard permission grant test case with flag

The failed test case assumes no permission inheritance from default
device, which requires flag device_aware_permissions_enabled to be
enabled.

Bug: 325534406
Test: atest DeviceAwarePermissionGrantTest#onHostDevice_requestPermissionForHostDevice_shouldGrantPermission
Change-Id: Ifb31aa6216da51e88ff1504398fe64dd1bc8aa78