Reset unset app-ops when the admin sets cross-profile packages.

When the admin unsets cross-profile packages, reset the
INTERACT_ACROSS_PROFILES app-op back to the default if it is no longer
configurable by the user.

Other minor changes:
- Remove the explicit app-op permission check from
setInteractAcrossProfilesAppOp, since AppOpManager performs that check
when required.
- Fix the broadcasting logic in CrossProfileAppsServiceImpl to correctly
set the component and flags.

Bug: 136249261
Bug: 148010178
Test: atest CtsDevicePolicyManagerTestCases:com.android.cts.devicepolicy.ManagedProfileCrossProfileTest
Change-Id: Ib8b5f331fb92fc475bc95ad039adf93fac04da37