Inform AMS about the uid blocked reasons.

This will be used to let the application thread
know whether or not to block for network rules to
be updated when coming to the foreground.

Bug: 226299593
Test: atest tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java
Change-Id: I9bff481a0026fb57af8dbee580e617c8410f9ebe
Merged-In: I9bff481a0026fb57af8dbee580e617c8410f9ebe