[pm] fix a deadlock

Avoid calling into AppOpsService under PMS's lock.

FIXES: 332032058
Test: atest android.appenumeration.cts.CrossUserPackageVisibilityTests#testSetApplicationCategoryHint_cannotDetectStubPkg
Test: atest android.content.pm.cts.ApplicationInfoTest#setOwnAppCategory
Test: atest android.packageinstaller.install.cts.SessionTest#setAppCategory

Change-Id: I64b5ab2bb1f171f6fd61e2af4e16436ad8b88a91