Adjusts the logic of onPackageForceStop to return the proper values

The fxn should return true only if any force-stopped packages are enabled
and doit=false (this indicates something else should handle the stop).
In all other cases, the fxn should return false.

Test: atest AccessibilityManagerService
Bug: 337392123
Flag: aconfig manager_package_monitor_logic_fix
Change-Id: I4a0ed813011e4b0cb7363b35305e0a5e20391a67