While-idle alarm timeout & EBS

Use the long whileidle timeout for apps in the background.

Test: Manual test with a test app (I9d0c0ed4b6a0)
Test: atest $ANDROID_BUILD_TOP/frameworks/base/services/tests/servicestests/src/com/android/server/ForceAppStandbyTrackerTest.java
Test: atest $ANDROID_BUILD_TOP/cts/tests/tests/batterysaving/src/android/os/cts/batterysaving/BatterySaverAlarmTest.java
Bug: 72124522
Change-Id: Ibd0a46e573604f7f2d1ec51a60ea87c163233003