run-as: remove a special case.

This is a change for some system apps that have /data/user_de/0/ in the
package list, but it's easier to reason about and more consistent to
always go down the same path.

Bug: http://b/308990322
Test: treehugger
Change-Id: I479485655c61e8a31fb23f779c66d54b0bb476c0
diff --git a/run-as/run-as.cpp b/run-as/run-as.cpp
index e7c6e04..32057b4 100644
--- a/run-as/run-as.cpp
+++ b/run-as/run-as.cpp
@@ -196,14 +196,6 @@
   }
   if (setegid(old_egid) == -1) error(1, errno, "couldn't restore egid");
 
-  // Handle a multi-user data path
-  if (userId > 0) {
-    free(info.data_dir);
-    if (asprintf(&info.data_dir, "/data/user/%d/%s", userId, pkgname) == -1) {
-      error(1, errno, "asprintf failed");
-    }
-  }
-
   if (info.uid == 0) {
     error(1, 0, "unknown package: %s", pkgname);
   }
@@ -226,6 +218,12 @@
     error(1, 0, "package not debuggable: %s", pkgname);
   }
 
+  // Ensure we have the right data path for the specific user.
+  free(info.data_dir);
+  if (asprintf(&info.data_dir, "/data/user/%d/%s", userId, pkgname) == -1) {
+    error(1, errno, "asprintf failed");
+  }
+
   // Check that the data directory path is valid.
   check_data_path(pkgname, info.data_dir, userAppId);