Log WTF message when FGS is started by bindService() from a persistent

process.

Previously logFgsBackgroundStart() only logs FGS start from the
background proc state. Now we need to log FGS start from persistent proc
state to troubleshooting the FGS started by system_server bindService().

Bug: NA.
Test: atest cts/tests/app/src/android/app/cts/ActivityManagerFgsBgStartTest.java
Change-Id: I04988b24f0b4790c85d2584d3a37c9cd3f8c2671