Add an additional flag guard for Private Space implementation [Services
& PackageInstaller]

This a layer of flag guarding only for the implementation of Private Space features excluding the APIs. The MVP flag allow_private_profile still guards all the features including the APIs.

Bug: 326060689
Test: Manual - a few verifications that some feeatures are unavailable when this flag is disabled
Test: Run presubmits and verify that nothing breaks
Ignore-AOSP-First: Relies on a flag that is not in AOSP

Change-Id: I1ba0c21fc842b79250d26647282e9d019f7664e0
diff --git a/packages/PackageInstaller/Android.bp b/packages/PackageInstaller/Android.bp
index 98a5a67..79c810c 100644
--- a/packages/PackageInstaller/Android.bp
+++ b/packages/PackageInstaller/Android.bp
@@ -54,6 +54,7 @@
         "androidx.lifecycle_lifecycle-extensions",
         "android.content.pm.flags-aconfig-java",
         "android.os.flags-aconfig-java",
+        "android.multiuser.flags-aconfig-java",
     ],
 
     lint: {
@@ -85,6 +86,7 @@
         "androidx.lifecycle_lifecycle-extensions",
         "android.content.pm.flags-aconfig-java",
         "android.os.flags-aconfig-java",
+        "android.multiuser.flags-aconfig-java",
     ],
     aaptflags: ["--product tablet"],
 
@@ -118,6 +120,7 @@
         "androidx.lifecycle_lifecycle-extensions",
         "android.content.pm.flags-aconfig-java",
         "android.os.flags-aconfig-java",
+        "android.multiuser.flags-aconfig-java",
     ],
     aaptflags: ["--product tv"],