MicrodroidDeviceTestBase: Fix logging runInShellWithStderr

Test: Manually
Bug: N/A
Change-Id: Idde456984f11ea554f8b35852c8f5b094f1277af
diff --git a/tests/helper/src/java/com/android/microdroid/test/device/MicrodroidDeviceTestBase.java b/tests/helper/src/java/com/android/microdroid/test/device/MicrodroidDeviceTestBase.java
index 4294df4..4523572 100644
--- a/tests/helper/src/java/com/android/microdroid/test/device/MicrodroidDeviceTestBase.java
+++ b/tests/helper/src/java/com/android/microdroid/test/device/MicrodroidDeviceTestBase.java
@@ -625,7 +625,7 @@
             stdout.transferTo(out);
             stderr.transferTo(out);
             String output = out.toString("UTF-8");
-            Log.i(tag, "Got output : " + stdout);
+            Log.i(tag, "Got stdout + stderr : " + output);
             return output;
         } catch (IOException e) {
             Log.e(tag, "Error executing: " + command, e);