Support /product-services partition

This CL is largely an adaptation of Change-Id
I16175933cebd9ec665d190cc5d564b5414a91827 . I also used the same way for
testing the change.

This CL will support the followings.
- installing a RRO package for framework from /product-services/overlay
- installing apps from /product-services/app
- installing priv-apps from /product-services/priv-app
- installing permissions from
  /product-services/etc/[default-permissions|permissions|sysconfig]

Bug: 80741439
Test: `mm` under frameworks/base/tests/[libs|privapp]-permissions
  adb sync && adb reboot
  adb shell cmd package list libraries
    => confirmed com.android.test.libs.product_services library
  adb shell cmd package dump \
    com.android.framework.permission.privapp.tests.product_services
    => confirmed that the package is a priv-app

  And I moved vendor/overlay/framework-res__auto_generated_rro.apk
  into system/product-services/overlay/ on taimen, and I confirmed that the
  RRO was installed properly.

Change-Id: I7a6a30bf8e8db9f2738594d187bb9148f138b8da
(cherry picked from commit a4af41736894bd3bf5bdc2a279acbeed2a24dd3d)
diff --git a/services/core/java/com/android/server/pm/permission/PermissionManagerService.java b/services/core/java/com/android/server/pm/permission/PermissionManagerService.java
index 9dc0b29..c4f90a12 100644
--- a/services/core/java/com/android/server/pm/permission/PermissionManagerService.java
+++ b/services/core/java/com/android/server/pm/permission/PermissionManagerService.java
@@ -1097,6 +1097,10 @@
         } else if (pkg.isProduct()) {
             wlPermissions =
                     SystemConfig.getInstance().getProductPrivAppPermissions(pkg.packageName);
+        } else if (pkg.isProductServices()) {
+            wlPermissions =
+                    SystemConfig.getInstance().getProductServicesPrivAppPermissions(
+                            pkg.packageName);
         } else {
             wlPermissions = SystemConfig.getInstance().getPrivAppPermissions(pkg.packageName);
         }
@@ -1129,6 +1133,9 @@
                     } else if (pkg.isProduct()) {
                         deniedPermissions = SystemConfig.getInstance()
                                 .getProductPrivAppDenyPermissions(pkg.packageName);
+                    } else if (pkg.isProductServices()) {
+                        deniedPermissions = SystemConfig.getInstance()
+                                .getProductServicesPrivAppDenyPermissions(pkg.packageName);
                     } else {
                         deniedPermissions = SystemConfig.getInstance()
                                 .getPrivAppDenyPermissions(pkg.packageName);