Add ACTION_USER_RESTRICTIONS_CHANGED to protetced-broadcast.

Test: cts-tradefed run cts-dev --skip-device-info --skip-preconditions --skip-system-status-check com.android.compatibility.common.tradefed.targetprep.NetworkConnectivityChecker -a armeabi-v7a -l INFO -m CtsDevicePolicyManagerTestCases -t 'com.android.cts.devicepolicy.UserRestrictionsTest#testUserRestrictions_deviceOwnerOnly'
Test: cts-tradefed run cts-dev --skip-device-info --skip-preconditions --skip-system-status-check com.android.compatibility.common.tradefed.targetprep.NetworkConnectivityChecker -a armeabi-v7a -l INFO -m CtsDevicePolicyManagerTestCases -t 'com.android.cts.devicepolicy.UserRestrictionsTest#testUserRestrictions_primaryProfileOwnerOnly'
Test: cts-tradefed run cts-dev --skip-device-info --skip-preconditions --skip-system-status-check com.android.compatibility.common.tradefed.targetprep.NetworkConnectivityChecker -a armeabi-v7a -l INFO -m CtsDevicePolicyManagerTestCases -t 'com.android.cts.devicepolicy.UserRestrictionsTest#testUserRestrictions_secondaryProfileOwnerOnly'

Bug: 36355208
Change-Id: I7a002c1f796a3d1f6241577e6284a8e74bb96749