Adjust permission checking of ensureCanModifyQuietMode

Two changes:
1. Verify caller package matches with calling UID before checking
   is it default launcher.

2. If IntentSender is specified, only caller with MANAGED_USERS
   can call through it.

Test: run cts-dev --module DevicePolicyManager --test com.android.cts.devicepolicy.QuietModeHostsideTest

Bug: 70212757

Change-Id: Iac118d988eb05097a56f343552c0b8845cf96749