Allow suspending all apps for quiet mode.

When the profile is in quiet mode, no apps should be able
to show UI or notifications. With this CL when packages
are suspended for quiet mode, no package is exempt unlike
when an admin or and app suspends them.

Bug: 258823777
Test: atest SuspendPackageHelperTest
Test: atest CtsSuspendAppsTestCases
Test: atest android.devicepolicy.cts.QuietModeTest
Change-Id: I6131c9af23bc092d651958539703b5299baed1f0