all forced app standby enabled except for when the device
is charging.
Reverting the revert of this CL. The only change is to use
EXTRA_PLUGGED instead of EXTRA_STATUS in detecting charging
state. Verified that this passes CTS test for battery saver.
Bug: 69259147
Test: atest frameworks/base/services/tests/servicestests/src/com/android/server/ForceAppStandbyTrackerTest.java
Test: atest CtsBatterySavingTestCases
Change-Id: I4f3ffc0c865a1a3a035b6d9d6838b5056b666eb9