Skip checking allowlist for non-system apps

Bug: 264592023
Test: PermissionTestCases
Change-Id: Ibd657b0cbfbad4f482497fb04c33b594fa25f283
Merged-In: I8e291eccc251e80729c5d5e293928d80317f1d7c

services/core/java/com/android/server/pm/permission/PermissionManagerServiceImpl.java

@@ -3268,7 +3268,7 @@ public class PermissionManagerServiceImpl implements PermissionManagerServiceInt
         if (Objects.equals(packageName, PLATFORM_PACKAGE_NAME)) {
             return true;
         }
-        if (!pkg.isPrivileged()) {
+        if (!(pkg.isSystem() && pkg.isPrivileged())) {
             return true;
         }
         if (!mPrivilegedPermissionAllowlistSourcePackageNames