Fix AMST#incrementProcStateSeqAndNotifyAppsLocked.

Recently we changed the threshold proc_state used for
enforcing network restrictions, so updating the test taking
that change into account.

Bug: 177641226
Test: atest ./services/tests/servicestests/src/com/android/server/am/ActivityManagerServiceTest.java
Change-Id: Ic8be34f394c3577d193e6a0b5cccd014d309fb9f