Let profile owners also receive OTA notification.

Also removed the code that sends broadcast to all device admins
in profile owner package since it was used for legacy
provisioning of the whole package and now should be migrated
by findOwnerComponentIfNecessaryLocked().

Test: gts-tradefed run gts -a armeabi-v7a -m GtsGmscoreHostTestCases -t com.google.android.gts.devicepolicy.ManagedProfileTest
Change-Id: I6316df7375fd24da133c83c7930815ba909194f2
Bug:31000521