Makes static shared libs visible to installer

Prior to this change, shared libraries could be installed by, but were
not visible to installers. This made management of them impossible.

Change-Id: Id6e45a2ad8d5b1dbb8b5e0967a035ec53268904d
Fixes: 66673959
Test: manual - installed static lib and verified installer could view it

services/core/java/com/android/server/pm/PackageManagerService.java

@@ -4223,6 +4223,11 @@ public class PackageManagerService extends IPackageManager.Stub
                     || appId == Process.ROOT_UID) {
                 return false;
             }
+            // Installer gets to see all static libs.
+            if (PackageManager.PERMISSION_GRANTED
+                    == checkUidPermission(Manifest.permission.INSTALL_PACKAGES, uid)) {
+                return false;
+            }
         }
 
         // No package means no static lib as it is always on internal storage