Allow "android" package name.

Test: /data/nativetest64/installd_utils_test/installd_utils_test
Bug: 36062649

(cherry picked from commit ab7ac8d5a04bd3f38b85ce20ae5bb382f2a26585)

Change-Id: I20d546fdd20813e96bcb5f061ca5b352dff44450
diff --git a/cmds/installd/utils.cpp b/cmds/installd/utils.cpp
index ba40041..c59f481 100644
--- a/cmds/installd/utils.cpp
+++ b/cmds/installd/utils.cpp
@@ -371,7 +371,7 @@
         return false;
     }
 
-    if (!hasSep || front) {
+    if (front) {
         LOG(WARNING) << "Missing separator in " << packageName;
         return false;
     }