Fix log string checked to test vbmeta verification

aosp/2294139 added a cosmetic change leading to an extra space in log
emitted by fs_mgr in case of failed vbmeta verification. Fix the test to
verify the new string.

Test: #testBootFailsWhenVbMetaDigestDoesNotMatchBootconfig
Bug: 267285299
Change-Id: I0a13a9333494b67125ee7b24a516bea4753fbacc
diff --git a/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java b/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java
index 2ee33e6..730c7dd 100644
--- a/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java
+++ b/tests/hostside/java/com/android/microdroid/test/MicrodroidHostTests.java
@@ -489,7 +489,7 @@
         assertThatEventually(
                 100000,
                 () -> getDevice().pullFileContents(CONSOLE_PATH),
-                containsString("init: [libfs_avb]Failed to verify vbmeta digest"));
+                containsString("init: [libfs_avb] Failed to verify vbmeta digest"));
         vmInfo.mProcess.destroy();
     }